possibly corrupted files

getting an error "Failed to load common event data" message when I open the game. I swapped out a couple files from an old save and determined that CommonEvents.rxdata, MapInfos.rxdata, System.rxdata, and most importantly Scripts.rxdata are all apparently corrupted.

probably nothing I can do about this besides replacing the files with old versions, but I'm really hoping there could be a better solution. My last backup was ~3 weeks ago and I've done a lot of scripting since then :( it'd be a lot to redo.

any suggestions?