When you first install NXPowerLite Desktop on macOS Big Sur you will notice that when you right-click a supported file there will not be any NXPowerLite options in the Finder menu. This is due to Big Sur's feature to manage Finder extensions.
Enable NXPowerLite's Finder extension by following these steps:
- Ensure NXPowerLite has been properly installed
- Open System Preferences and click on Extensions
- On the left-hand side ensure you are on the tab Added Extensions
- On the right under NXPowerLite Desktop enable the Finder Extensions checkbox
If you have been successful you will see the options shown in the image below when you right-click a file supported by NXPowerLite.