Okay, here's one for you. I am using P3D v3.2. I used simstarter yesterday for the first time. Created a profile and it started the sim and everything was fine. Today I use it and it started the sim and the sim went to running as a background app. I closed simstarter and started my P3D and it opened ok. Tried simstarter again and again the sim ran as a background app. When I first started simstarter today, it did update to a newer version. Don't know if that had anything to do with this.