This page reproduces EULA version 3.0 (effective 2026-08-03), the same text presented for acceptance in the installer.
1. Parties and acceptance
This End-User License Agreement ("Agreement") is a binding legal agreement between you, or the legal entity you represent ("Licensee"), and U2DIA (business registration no. 749-58-00902, representative 최유이) ("Licensor"), governing the DION AI software, including the CAM add-in, desktop board, license client, documentation, and related components (collectively, the "Software"). By installing, activating, copying, or using the Software — including by accepting this Agreement in the installer — Licensee agrees to be bound by it. If Licensee does not agree, Licensee must not install or use the Software. If you accept on behalf of an entity, you represent that you have authority to bind that entity.
2. Definitions
"Seat" means an authorization to run the Software on one identified computer. "Machine Binding" means the cryptographic association of a Seat with a hardware fingerprint of that computer. "Perpetual License" means a non-expiring right to use the Version current at purchase. "Maintenance" means the annual support and update subscription. "Trial" means the time-limited evaluation license. "Version" means a release of the Software identified by its version number. "Control Plane" means Licensor's licensing and update service.
3. License grant
Subject to this Agreement and payment of all applicable fees, Licensor grants Licensee a non-exclusive, non-transferable, non-sublicensable, revocable license to install and use the Software on the number of Seats purchased, solely for Licensee's internal manufacturing and engineering operations. Each Seat is bound to one computer through Machine Binding. Concurrent use of one Seat on more than one computer is not permitted.
4. Seats, machine binding, and transfer
Seats are administered through Licensee's account on the Licensor website. A Seat may be released from one computer and re-bound to another by Licensee's account administrator, subject to a reasonable cooling-off interval to prevent Seat sharing. Licensor may limit the frequency of transfers. Deactivating hardware, reinstalling the operating system, or virtualizing the environment does not create additional Seat entitlements.
5. Perpetual license and covered version
A Perpetual License grants the right to use, without time limit, the Version made available to Licensee during an active Maintenance term, and to continue using the last such Version after Maintenance lapses. A Perpetual License does not confer rights to Versions released after Maintenance lapses. Perpetual rights remain subject to activation and to the restrictions in this Agreement.
6. Maintenance and support
Maintenance is sold annually at the published rate and provides updates, ontology and vendor-coverage improvements, and support intake as described in the then-current service description. Maintenance may be renewed at each anniversary. If Maintenance lapses and is later reinstated, Licensor may require payment of the lapsed period or a reinstatement fee. Support is provided in Korean and English during Licensor's business hours.
7. Trial license
Licensor may make the Software available for a Trial of thirty (30) days per organization and per computer. A Trial is granted for evaluation only, is not for production use, may exclude certain features, and is provided without warranty or support. A Trial may not be renewed, extended, stacked, or obtained repeatedly through reinstallation, hardware alteration, new accounts, or clock manipulation. Licensor may terminate a Trial at any time. At Trial expiry the Software ceases to permit licensed operations until a paid license is activated.
8. Activation, validation, and offline grace
The Software requires activation with a valid license key and periodic online validation with the Control Plane. To support shop-floor conditions, the Software operates offline for a grace period of up to thirty (30) days from the last successful validation. Upon expiry of that grace period without successful validation, licensed operations are suspended until validation succeeds. Licensee acknowledges that the Software records tamper-evident timing information locally for the sole purpose of enforcing license terms.
9. Technical protection measures and anti-circumvention
The Software includes technical protection measures, including machine binding, signature verification, integrity checks, and tamper detection. Licensee shall not circumvent, disable, or interfere with these measures, nor manipulate system time, virtual machine state, or stored license artifacts to obtain use beyond Licensee's entitlement. Detected circumvention is a material breach, may cause the Software to enter a locked state requiring online reactivation, and may result in termination without refund. This clause is subject to Section 10.
10. Restrictions (subject to mandatory law)
Except as expressly permitted by this Agreement, Licensee shall not: (a) reverse engineer, decompile, or disassemble the Software; (b) rent, lease, lend, sublicense, resell, or provide the Software as a service to third parties; (c) remove or alter proprietary notices; (d) use the Software to develop a competing product; or (e) exceed purchased Seat counts. Nothing in this Agreement restricts rights that cannot be lawfully restricted. In particular, and without limitation, the rights of lawful users under Articles 5 and 6 of Directive 2009/24/EC (including decompilation for interoperability) and equivalent national provisions such as §§ 69d–69e UrhG remain unaffected, as do non-waivable rights under the laws of Licensee's jurisdiction.
11. Ownership and feedback
The Software is licensed, not sold. Licensor and its licensors retain all right, title, and interest in and to the Software, including all intellectual property rights. Licensee retains ownership of Licensee's own CAD/CAM data and machining know-how. If Licensee provides feedback or suggestions, Licensor may use them without obligation or compensation, provided such use does not disclose Licensee's confidential data.
12. On-device operation and customer data
The Software operates on-device. Licensee's CAD/CAM files, tool libraries, and machining parameters are processed locally and are not transmitted to Licensor as part of normal operation. Any diagnostic bundle or telemetry is opt-in and is described at the point of collection. Where Licensee enables an optional third-party AI provider, Licensee's submitted content is transmitted to that provider under that provider's terms, and Licensee is responsible for ensuring such transmission is permitted.
13. Personal data
Licensor processes limited personal data — account identifiers, contact details, license and Seat records, and machine fingerprints — to perform this Agreement, in accordance with applicable law, including the Personal Information Protection Act of Korea and, where applicable, Regulation (EU) 2016/679 (GDPR). A machine fingerprint is a derived, non-reversible identifier used solely for license enforcement. Details on categories, retention, international transfers, and data subject rights are set out in the Privacy Notice. Where Licensor acts as a processor for Licensee, the parties shall execute a data processing agreement on request.
14. Safety and human verification
THE SOFTWARE ASSISTS WITH, BUT DOES NOT REPLACE, QUALIFIED HUMAN JUDGEMENT. All machining outputs — including toolpaths, cutting conditions, tool selections, and NC programs — are advisory and MUST be verified by a competent operator before execution on any machine tool. Licensee is solely responsible for machine safety, fixture integrity, collision checking, dry runs, and compliance with machine tool and workplace safety requirements. The Software is not designed, intended, or authorized for use in any application where failure could result in death, personal injury, or severe environmental damage.
15. Limited warranty and exclusive remedy
Licensor warrants that, for ninety (90) days from delivery, the Software will perform substantially in accordance with its documentation. Licensee's exclusive remedy, and Licensor's entire liability, for breach of this warranty is, at Licensor's option, repair, replacement, or refund of the fees paid for the non-conforming Software. This warranty does not apply to Trials, to modified or misused Software, or to failures caused by third-party software or hardware.
16. Warranty disclaimer
EXCEPT AS EXPRESSLY PROVIDED IN SECTION 15, THE SOFTWARE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT. LICENSOR DOES NOT WARRANT THAT THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE, OR THAT ITS RECOMMENDATIONS WILL BE OPTIMAL FOR ANY PARTICULAR PART, MATERIAL, OR MACHINE.
17. Limitation of liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW, LICENSOR SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR LOSS OF PROFITS, PRODUCTION, DATA, OR GOODWILL, OR FOR DAMAGE TO WORKPIECES, TOOLING, FIXTURES, OR MACHINE TOOLS, ARISING OUT OF OR RELATING TO THE SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY. LICENSOR'S TOTAL AGGREGATE LIABILITY SHALL NOT EXCEED THE FEES PAID BY LICENSEE FOR THE SOFTWARE IN THE TWELVE (12) MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM. NOTHING IN THIS AGREEMENT EXCLUDES OR LIMITS LIABILITY FOR DEATH OR PERSONAL INJURY CAUSED BY NEGLIGENCE, FOR FRAUD OR FRAUDULENT MISREPRESENTATION, FOR WILFUL MISCONDUCT OR GROSS NEGLIGENCE, OR FOR ANY OTHER LIABILITY THAT CANNOT LAWFULLY BE EXCLUDED.
18. Intellectual property indemnity
Licensor shall defend Licensee against a third-party claim that the unmodified Software, used in accordance with this Agreement, infringes that party's intellectual property rights, and shall pay damages finally awarded, provided Licensee promptly notifies Licensor, grants sole control of the defence, and provides reasonable assistance. Licensor may procure the right to continue use, modify the Software, or terminate the affected license with a pro-rata refund. This indemnity does not apply to claims arising from combination with non-Licensor products, modification, or use outside this Agreement.
19. Licensee indemnity
Licensee shall indemnify and hold Licensor harmless from claims, damages, and reasonable costs arising from Licensee's breach of this Agreement, Licensee's unlawful use of the Software, or claims relating to Licensee's machining operations, workpieces, or products.
20. Compliance audit
Licensor may, on thirty (30) days' written notice and not more than once per twelve (12) months, verify Licensee's compliance with Seat entitlements, during normal business hours and without unreasonable interference. Verification may use license records held by the Control Plane. If under-licensing of five percent (5%) or more is found, Licensee shall promptly purchase the required Seats and bear the reasonable cost of the audit.
21. Export control and sanctions
The Software may be subject to export control laws, including those of the Republic of Korea, the United States, and the European Union. Licensee shall comply with all applicable export, re-export, and sanctions laws, and shall not export, transfer, or make the Software available to any embargoed country or restricted party, nor use it for any prohibited end use, including nuclear, chemical, biological weapons, or missile-related applications.
22. Third-party and open-source components
The Software includes third-party and open-source components licensed under their own terms. Those terms govern the corresponding components and, where they conflict with this Agreement, prevail as to those components. A notices file listing such components and their licenses is provided with the Software.
23. Term, termination, and effect
This Agreement takes effect upon acceptance and continues until terminated. Licensee may terminate at any time by ceasing use and removing all copies. Licensor may terminate for material breach not cured within thirty (30) days of notice, or immediately for circumvention under Section 9 or unlawful use. On termination, all license rights, including Perpetual rights, cease; Licensee shall stop all use and delete all copies, and on request certify deletion. Sections 10–13 and 15–34 survive termination. Termination for Licensee's breach does not entitle Licensee to a refund.
24. Governing law and dispute resolution
This Agreement is governed by the laws of the Republic of Korea, excluding its conflict-of-laws rules and the United Nations Convention on Contracts for the International Sale of Goods. The Seoul Central District Court shall have exclusive jurisdiction as the court of first instance, provided that where Licensee is a consumer, mandatory jurisdiction and consumer-protection rules of Licensee's country of residence remain unaffected. The parties shall attempt good-faith resolution for thirty (30) days before commencing proceedings.
25. US Government end users
The Software is "commercial computer software" and "commercial computer software documentation" as those terms are used in 48 C.F.R. 12.212 and 48 C.F.R. 227.7202. US Government end users acquire only those rights set out in this Agreement.
26. General
Licensee may not assign this Agreement without Licensor's prior written consent, except to a successor of all or substantially all of its business. Neither party is liable for delay or failure caused by events beyond its reasonable control. If any provision is held unenforceable, it shall be limited to the minimum extent necessary and the remainder shall remain in force. Failure to enforce a provision is not a waiver. This Agreement, together with the order documents and the Privacy Notice, is the entire agreement and supersedes prior understandings. Licensor may update this Agreement for new Versions; continued use of an updated Version after notice constitutes acceptance, and Licensee may instead continue using the prior Version under the prior terms.
27. Refunds — 30-day, no questions asked
Licensor offers an unconditional 30-day refund. Within thirty (30) days of the original purchase of a perpetual licence, a subscription, or onboarding, Licensee may request a full refund for any reason or no reason, without explanation and without conditions. Requests are made from the account page or by contacting u2dia@naver.com, and are processed through Paddle.com, the Merchant of Record, to the original payment method; funds typically appear within 5–10 business days depending on the issuing bank. On refund the corresponding licences and seats are deactivated and Licensee shall cease use and delete all copies. For recurring subscriptions, cancelling stops future renewals and, within the same thirty-day window, the most recent renewal is refundable on the same unconditional basis. This policy is granted in addition to, and does not limit, any statutory right of withdrawal — including the fourteen-day right for consumers in the EU/EEA under Directive 2011/83/EU and the withdrawal rights under the Act on Consumer Protection in Electronic Commerce of Korea.
28. Licence metrics and scope of use
The unit of licensing is the Seat, each bound to one identified computer. Use is authorised only for Licensee and its Affiliates (entities Licensee controls, is controlled by, or is under common control with, "control" meaning more than 50% of voting interests), and solely for their internal manufacturing operations. Licensee is responsible for its Affiliates' compliance. The Software may not be used to provide a service bureau, time-sharing, hosting, or output-for-hire to third parties, except that Licensee may produce parts for its own customers in the ordinary course of its manufacturing business.
29. Virtualisation, VDI, and emergency re-hosting
A Seat may run in a virtual machine or virtual desktop (VDI), provided that at any time no more than the licensed number of Seats are in use concurrently and each running instance corresponds to an entitled Seat. Machine binding may attach to the virtual environment's fingerprint. If a bound computer suffers hardware failure, Licensee may re-host the affected Seat to replacement hardware through the account, or by contacting Licensor where self-service is unavailable, without purchasing an additional Seat. Licensor may take reasonable measures to confirm that concurrent use does not exceed entitlements.
30. Confidentiality and benchmarks
Each party may receive non-public information of the other ("Confidential Information"), which the receiving party shall protect with at least reasonable care and use only to perform this Agreement. The Software, its licence keys, and any non-public technical or performance information about it are Licensor's Confidential Information. Licensee shall not publish or disclose to any third party the results of any benchmark, performance, or competitive evaluation of the Software without Licensor's prior written consent. This Section does not apply to information that is or becomes public through no fault of the receiving party, was rightfully known without obligation, or is independently developed.
31. Beta, preview, and pre-release features
Licensor may make features identified as beta, preview, evaluation, or pre-release available. Such features are provided "as is", may be changed or withdrawn at any time, are not covered by the limited warranty or any service commitment, and may not be relied upon for production. Licensee's use of them is at its own risk. Data or configurations created with pre-release features may not be preserved across releases.
32. Suspension
Licensor may suspend Licensee's access, in whole or in part, if (a) fees are overdue and not paid within a reasonable cure period after notice, (b) continued use poses a security risk or violates law, or (c) Licensor reasonably determines that use materially exceeds entitlements or circumvents the technical protection measures. Where practicable Licensor will give prior notice and limit the suspension to what is necessary. Suspension does not relieve Licensee of fees accrued.
33. Order of precedence and notices
In case of conflict, a signed order or enterprise agreement between the parties prevails over this Agreement, which prevails over any online or click-through terms, which prevail over documentation. Licensor's pre-printed terms on a purchase order have no effect. Notices to Licensor are given at u2dia@naver.com; notices to Licensee are given to the account contact of record or in-product. Notice is effective on receipt, or on the next business day if sent electronically after business hours.
34. Language and contact
This Agreement is provided in English and Korean. Questions regarding this Agreement may be directed to u2dia@naver.com.
Note: This Agreement is provided in Korean and English. In case of any discrepancy, the Korean version prevails, consistent with the governing law of the Republic of Korea.