A lot of changes were made in the version 2.0! including the switch to QT6, the development framework we use.
QT is also providing the UI elements, and the switch has introduced display issues on lower resolutions.
We have a PreRelease candidate for an upcoming version of LightBurn that we believe may fix your issue.
It will install on your system as a separate “PreRelease” version of LightBurn, which has its own set of preferences. This means it will not affect your standard installation of LightBurn at all, but it will also not have any personal customizations applied as in your current installation.
The installer should automatically ask if you want to import a copy of your standard release version preferences - you can also use the User Bundles feature to move over your preferences at any time later, if you choose.