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Nice quick save function...that doesn't work...

Hmm, it does work though. For me and everyone else I asked. No one else has reported this as a bug.

The Quick Save files are located in the "Q" tab on the Load and Save menus. At the bottom, there is A Q 1 2 3 4 5 ... etc. Hit the Q.
A message pops up when you hit the Quick Save button. --> "Quick save complete."

 Are you on Windows, Mac, Linux or Android? I've tested it on both Windows and Android just now, works perfectly.