Catalina Support ???? There is no indication on either your sales page or your recent facebook Ad that Perc X doesn't work in Catalina.
What a superb plug-in, I've just bought the Pro version.
How profoundly disappointed I am that I can't open it in Catalina. Will there be an update? What a waste if not.
I have tried the work arounds suggested in the other Catalina support post, but to no avail.
If I don't hear from you with a remedy very shortly I shall ask Fastspring for a refund.