HALion Sonic 7 UI changed

The UI for HALion Sonic 7 changed from the normal appearance to the image below, and I cannot get it to communicate now. I have reinstalled HALion Sonic 7, rescanned VST paths. I am using Reaper, but even the standalone shows the same UI. How do I get it back to the normal one, where I can select instrument presets?

Uninstalled HALion Sonic 7 and reinstalled. Issue resolved. Why did it happen, though?

I guess Reaper switched the UI to generic mode.