Waves plugin not showing in Cubase

My licensed VST plugin Waves Ultramaximizer L2 disappeared from Cubase 9.5 Pro.
The Waves installer (Waves Central) sees the plug-in and the activated license on an external USB disk. The file .bundle is in the correct place under C:\Program Files on my pc (Windows 7 SP2 64bit). The dll is in my Vstplugins directory.
Does somebody know why it doesn’t show in Cubase, when I open Studio/VST plugin manager?

Thanks for helping.

The Waves support team helped me at solving this. My plugin is v9.2 while the installer had been upgraded to V10 of Waves plug-ins. Helped by them, I rolled back to Waves 9.2 and the plugin shows again in Cubase, so definitely not a Cubase issue.