Played Dredmor (no bought expansions) yesterday for a good couple of hours. At end of that, I pressed Save and Quit. My copy of Steam had been running all night, and this morning, when I opened up Dredmor, the last Save game was BEFORE I had played yesterday, losing 2 hours of progress After reading some forums, I deleted my save folders and hoped to get a newer save off Steam. Nope. Steam gave me the same old save game when it re-synched.
Unfortunately, after loading the old savegame, I didn't immediately realise it was an old game. I walked down some stairs, prompting a new autosave before I realised
Oh. Well it sounds like you lost your newer save because of SteamCloud. Open C:\Users\***********\Documents\Gaslamp Games\Dungeons of Dredmor\config.xml And set a value of 0 to the enableCloud setting.