I was trying to reset my FSX by deleting the fsx.cfg file. After I deleted that FSX was exatly the same, but now it won't start. Does anyone know how to replace the fsx.cfg file, or do I need to uninstall and reinstall FSX?
You say won't start.
If you get a splash screen the delete the log file and the Sim should work.
Flight Sim Questions that are closely related to this...