Overwrote progress by starting another ending or NG+
Symptom
You overwrote your progress and want the earlier point back. The game has no separate New Game+ save.
Steps marked “changes files” delete, rename or overwrite something. Back up the whole save folder first.
Right-click
ER0000.sl2> Properties > Previous Versions and look for a Windows restore copy.Try an older Steam Cloud save. It depends on when it last synced, and one may not exist.
Next time, before each ending: close the game and copy
ER0000.sl2(or the whole<your Steam ID>folder) somewhere else. Turn off Steam Cloud while you swap files so it doesn't overwrite your copy.changes files