Cannot find Retrologue2 in VST Instruments in Cubase 13 Pro

I have Cubase 13 Pro and suddenly I lost Retrologue. I had a track made with it and then the instrument disappeared. It is not visible in the VST Instruments plug-in manager and I cannot add a Retrologue Instrument track in my project.
I have tried to reinstall Cubase 13 and Retrologue 2 with Steinberg Download Assistant many times without success.

I am running Cubase 13 Pro on Windows 11.