Settings not stable?

[planespotter]

Hi

Suddenly my settings are not being saved between sessions, i mean sometimes they are, but then every now and then i go to start the game and all the realism options are unchecked and the default info windows on the in game screen are back.

Will I have to do a complete revalidate and reinstall my campaigns or is there a simple reason someone might know why this happens - something with steam synch or what?