NurViewer End User Licence Agreement

NurViewer End User Licence Agreement — version 1.0, effective October 19, 2026.

This agreement is between you and NURSOVA LLC, a Wyoming limited liability company (Wyoming Reg. No. 2026-001978913), 30 N Gould St Ste N, Sheridan, WY 82801, USA ("Nursova", "we") and covers the NurViewer application for Windows and the account and licence service it uses ("NurViewer"). By installing or using NurViewer you accept it. If you do not accept it, do not use NurViewer.

1. Licence.

We grant you a personal, non-exclusive, non-transferable licence to install and use NurViewer on the devices your plan allows, for your own personal or internal business use. NurViewer is licensed, not sold. We keep all rights not expressly granted.

2. Plans.

NurViewer has a Free plan and two paid plans, Standard and Pro. What each plan includes, the daily and other limits, and the number of devices are shown in the application (the licence page) and may be adjusted for future versions; a change never removes the ability to read, edit, delete and export the data you already created. "Lifetime" describes access to the purchased tier for the supported life of NurViewer, subject to this agreement and the practical availability of the software and service; it is not a promise that any company, platform or service will operate forever. You pay once and are not billed again for that plan while it is offered. It does not include features we offer separately later (for example a subscription edition with additional functions), which will be described and priced when offered. Support for a file format means NurViewer can open and display it within the limits shown in the application and on our website. In particular, DWG is only a basic read-only 2D preview and NurViewer is not a CAD application; please do not buy NurViewer for DWG. Fuller DWG support is planned only for a possible future subscription edition, with no date.

3. Account and licence verification.

Using NurViewer on Windows requires verifying an account through a sign-in provider (Google or Microsoft). Your account identifies you; it does not give the provider access to your documents. Paid plans are activated by a signed licence issued to your account and device and refreshed periodically; if it cannot be refreshed within the grace period stated in the application, paid features return to the Free plan until it is. Do not copy, share, tamper with or bypass the licence or the usage limits.

4. Payment.

Paid plans are bought on Nursova's checkout page, operated by our payment provider Paddle, which acts as the seller of record and applies its own terms. See our Billing (https://nursova.com/nurviewer/app/billing/) and Refunds (https://nursova.com/nurviewer/app/refunds/) pages. Paid access is attached to your account only after the payment is verified and a valid signed licence is issued; a checkout success screen alone does not create it. A fully approved refund, credit or chargeback ends the paid licence it paid for.

5. Your documents and privacy.

NurViewer reads and converts your files on your device. Documents are not uploaded to us as part of using the application. We process the identity and licence information needed to verify your account and plan, and diagnostic information that contains no document content. See the Privacy Policy at https://nursova.com/nurviewer/app/privacy/ and how to delete your account at https://nursova.com/nurviewer/app/account-deletion/.

6. Restrictions.

You may not (a) copy, modify or distribute NurViewer except as this agreement or law permits; (b) reverse engineer, decompile or disassemble NurViewer or try to extract its source, except to the extent a law or an open-source licence that applies to a component expressly allows it despite this limitation; (c) remove licence, copyright or protection notices; (d) circumvent the licence, plan or usage mechanisms; (e) use NurViewer to infringe anyone's rights or to open or convert files you have no right to access, or to defeat access controls on content you do not own; or (f) rent, lease, resell or provide NurViewer as a service to others.

7. Third-party and open-source components.

NurViewer includes components that are licensed under their own terms, for example the mpv/FFmpeg media libraries (LGPL), the Microsoft ONNX Runtime (MIT), the PDF.js, ImageMagick WebAssembly, 7-Zip (LGPL, with the unRAR restriction), CharLS (BSD), caj2pdf-rust (MIT) and others. Their notices and licence texts are in the application (Settings → Open-source licences) and in the installation folder, and they apply to those components instead of this agreement. Nothing here limits your rights under those licences. For components whose licence requires source to be offered, we will provide it on request at legal@nursova.com.

8. Updates.

NurViewer is updated through the Microsoft Store. We may change or remove features in later versions, and we will not use an update to lock you out of data you created.

9. Termination.

This agreement continues until terminated. You may stop using NurViewer and uninstall it at any time. We may terminate it if you materially breach it and do not fix the breach within a reasonable time after notice, or immediately for licence circumvention or fraud (including a charged-back purchase). On termination you must stop using NurViewer; sections that by their nature survive, do.

10. No warranty.

NurViewer is provided "as is". To the extent the law allows, we disclaim all warranties, including merchantability, fitness for a particular purpose and non-infringement. Viewers and converters read many file formats and may display or convert a file imperfectly; keep your originals. Features described as previews, beta or partial are labelled as such in the application.

11. Limitation of liability.

To the extent the law allows, Nursova is not liable for indirect, incidental, special, consequential or punitive damages, or for lost data, profits or business, and our total liability for any claim relating to NurViewer is limited to the amount you paid for NurViewer in the 12 months before the claim (or USD 20 if you paid nothing). Nothing limits liability that cannot be limited by law, including for death or personal injury caused by negligence, or fraud, and your statutory consumer rights are not affected.

12. Governing law and disputes.

This agreement is governed by the laws of the State of Wyoming, USA, without regard to conflict-of-laws rules. Before commencing a formal claim, contact legal@nursova.com and allow 30 days for an informal resolution attempt. If the dispute is not resolved, it will be submitted to binding arbitration in Sheridan County, Wyoming under the rules of the American Arbitration Association, except that either party may seek injunctive relief in a court of competent jurisdiction. This section does not override a mandatory consumer right or forum that cannot lawfully be waived.

13. General.

If a provision is unenforceable, the rest remains. This is the entire agreement about NurViewer; we may update it for a new version, and continuing to use that version means you accept the update. Contact: product support support@nursova.com; legal and privacy legal@nursova.com; security reports security@nursova.com; +1 (508) 499-8816.