I Just Actually Got The Steam Version of SP, But When I Download A Plane, It Asks Me Which Program Should Run The File. Normally When i Ran The Files On My Outdated SPs, They Worked Right Away. And I Have 2 SPs I Use, 1.4.1.0, And Steam. 1.4.1.0 Does Work, But The Steam Version Is Totally Screwed With Files.