Hey Yves,

for being way honest I haven't tried this with these two different versions, but under normal conditions you simply copy all Preferences (stored in the folder where you catalyst app sits in) and put it in the folder where your new Catalyst App is in.
The Preferences are ALL Files you'll find in the Catalyst App Folder EXCEPT the Catalyst App itself..

If you use custom 3D Models or custom pixelmad fixtures you'll need to copy this additionally...

Best

Rolf