EDIT - and btw, I bought that plugin from WaveTracing... there is an issue with it on Catalina. For some it runs, for others it doesn't pass validation. For me, it didn't. Issued an immediate refund and said they'd prioritize resolution.
I agree 100% bout getting your money back if its not working with Cat. Another reason l mess with windows instead of a Mac. E dod apple upgrade agaian or something? What version of Cat are you up to?