Just re-downloaded Rekord Buddy (1.x) from the App Store. It was apparently first on the App Store in 2012 😱. At least now I can look into writing a test to offer valid 1.x users some kind of an upgrade path.
Got caught up in getting the old 2.1beta to compile but in the end I think it was worth it. The build now has the new signing certificate and it will become 2.0.24 which means when that is done I'm down to only juggling two builds. That feels great.