After running one time and quitting the game, the game does not start, screen stays black and only my mouse cursor is visible. Deleting the files in the app data folder (windows 7), reloading and rerunning fixes. The happens repeatedly. Runs fine once, quit game, won't run, deleted, reload (lather, rinse, repeat....) April 6th, 2016, version build Alpha13win. Never had this problem with other builds.