Looking at Old Theater Mode Files

I did a LASO run of Reach a while back and saved the theater mode files on my PC so they wouldn’t get overwritten. I had intended to reopen the files in theater mode to record a few moments from them, but didn’t find time to do so before the most recent patch came out which broke older campaign theater mode files. I tried loading them back up just to see what would happen, and sure enough I got a theater mode error as soon as I tried to start them. Does anyone know a way I can salvage these files? Is there a mod that I could use to view these older files? Would it be possible to rollback to a previous version of MCC and run it in offline mode? If anyone knows a workaround, please let me know, as I’d really love to be able to take some recordings of these before abandoning them.