No. Starting from version 7, it is now necessary for subscriptions to be renewed in order to continue to use the software, and keep your NoMachine server(s) in a functional state.

This applies to v7 licenses and also v5/v6 licenses activated in version 7 software.

Please also refer to the following articles:

How to renew your subscription
https://www.nomachine.com/AR03D00373

Why renewing your NoMachine Server license is important
https://www.nomachine.com/AR03D00365

Purchasing a subscription from the NoMachine for the Enterprise range
https://www.nomachine.com/AR10K00711

NoMachine EULA
https://www.nomachine.com/licensing