Bug report: Improper shutdown

Demigod isn't shutting down properly on my machine.  When I exit Demigod any time after playing a game, the process stays in the background, eating up a good 500 MB of memory, and I can't end the process manually through the task manager.  It also keeps me from re-running Demigod, since the process is there, Demigod thinks its already running.  I AM running Windows 7 beta (build 7068), so it might be a windows issue, and it's no huge problem, but I figured you should know.