The startupError.txt in the first post includes
Code:
bei CrewChiefV4.Properties.Settings.get_main_window_position() in C:\projects\crewchief_c_sharp\CrewChiefV4\CrewChiefV4\Properties\Settings.Designer.cs:Zeile 4279.
bei CrewChiefV4.UserSettings..ctor() in C:\projects\crewchief_c_sharp\CrewChiefV4\CrewChiefV4\UserSettings.cs:Zeile 298.
which tells me the program wasn't the one I built and released so I'm confused. If someone can upload a boot trace (see Crew Chief Help) there should be clues in there.