The short version: is there a way to hot swap fireface UC units so that my software thinks they're the same unit and doesn't name the new one something different?

The long version: We're running Sonar 8.5 for our live rig. We have a couple of different hardware setups depending on how far we travel. We have two RME Fireface UC units, one for each rig. They're both updated to the same firmware. The problem arises when we switch rigs. When opening a file in Cakewalk, a message pops up that it can't find the same MIDI device that was saved in the file. The problem is that Cakewalk is calling the 1st fireface unit "UC midi port 1" and when we're not using the 1st unit but we have the 2nd fireface unit plugged in, cakewalk is calling the 2nd unit "2 - UC midi port 1".

So it seems as though the solution is to copy all of my cakewalk projects to another folder, and go through every project and change the midi outs in each file to the 2nd unit, and use those project files when using the 2nd fireface rig.  Surely there's a better way? I was thinking if I could find the .ini file that cakewalk uses to keep track of the units I could amend or delete it so cakewalk starts fresh when changing from one fireface to another, but I can't find where that info is stored. Any thoughts are appreciated! I'd hate to have to go through all of those files to create a whole new set for using different audio interfaces...

BTW, the audio channels don't change names between units and seem fine.