Not sure exactly how I screwed this one up. I copied the couchpotato.db file from an old Nas to new Asustor.
copied it to:
/volume1/.@plugins/AppCentral/couchpotato/config
after copy CP wont start. removed the CP APP, double checked there are no CP dir in APPCentral folder.
reinstalled CP. same problem, CP wont start.