Cubase 10.5 update renders all compositions inaccessible

I lately updated Cubase 10 Pro to 10.5_64
this had the immediate effect of making inaccessible 19 minutes of almost complete orchestral composition.

I get multiple ‘The plug-in Konatkt 5 could not be found…’ warnings.

I’ve tried running Cubase in Administrator mode and a previously posted ‘solution’ that entailed deleting several Vst2x files, neither worked.

I’d welcome suggestions re: how to get Cubase 10.5_64 to recognize Kontakt (it knows where Eastwest Player is).

I assume you have tried adding the Kontakt folder in the VST Plug-in Manager and re-scanning?