Since the patch to 1.3 the game does not load anymore, as it is looking at D:\StarControl_BM\... for the game files, but my D:\ drive is an USB-Drive, and the game is installed on G:\

I contacted support, but did not get an answer yet, does anyone have a simmilar issue?

Sympoms are: Star Control Origins opens Splash screen und shows loading-state.
In the background a log-file is written in the game-directory that tells that some files cannot be found.
The path where the files are looked for seams to be hardcoded in the Star Control Origins exe file

I wonder if this is what's happening to me.

I can start the game, but when I try to start a new campaign the game just hangs on a loading screen forever. Very annoying.

Star Control: Origins has been removed from Steam, so customer support on this is unlikely.