Does anyone know what to do when this happens with the Washington Edition?

Two days ago I had a corrupted savegame. I used the running-as-administrator workaround and was able to keep playing.

Then, yesterday I played as usual and got to almost the end of sequence 6 (collected all feathers before) and quit the game.

When I wanted it to play today, the game wouldn't run. It never got to the intro screen, it got an Appcrash or ApphangB1 error.

Deleting the save games let the game run again.

I tried to download a savegame from the internet, but those files have names like 1.save or 3.save. Mine have names like Save044.sav and so on. Renaming the downloaded files and adding an entry doesn't work, it results in a damaged savegame. (especially since not a single savegame download page explains how to tweak the saves.ini once you copied the downloaded savefile into the folder)