The developer is Adobe. They will tell you there is a solution, an upgrade was made available to current customers years ago, but your app has not been current in about 7 years. Catalina was designed to block all apps more than a year old, so all your old apps are now junk. Creative Cloud subscriptions are what you need. You will also be ready when Apple play the same game next time. It's all part of the Joy Of Mac.
I know the developer is Adobe, but I cant find how to contact them about this?
Also you mention creative cloud, I have this but none of the applications that I had for CS6 - is there any way of me getting the Master Collection that i've already purchased, rather than purchasing updated versions of the products separately?