I'm trying to restart dawnguard by disabling the dawnguard files from the skyrim launcher to save and re-enable to take vampire side.

But every time I try to save the game from Dawnguard Disabled the Skyrim crash, and i got a SaveFile.ess.tmp even if i rename ess.tmp to .ess it doesn't load.

I don't want start again because i did all the sidequests.

Anybody can help?