Every time I launch the rebellion beta, I have to re-configure all of my settings.  I remember reading about a similar problem with sins trinity I believe, and it had something to do with the location of where the game save data is stored.  I have since deleted the savegame data for rebellion (I think in two locations) hoping to resolve the issue, but now it doesn't even create new settings data at all.

I've uninstalled and reinstalled twice (within steam) to no avail.  Any idea what might be going on?