Yeah I know what is going on, it's not easy for me to change the app to get macOS not to do this, but you can still use the app.
The solution is to enter in the terminal:
xattr -cr “/path/to/application.app“
sorry for the awkwardness!
edit: Just to be clear, the app isn't actually damaged. But macOS considers any unverified app to be "wrong". It's ostensibly for security but it seems more like a racket to me.