Hello, I checked the GPS and the navigation window are enabled. So I opened the FSC10 folder, opened the subfolder / tool, I ran the Reset_FSC.exe program as an administrator and I clicked the "Reset FSCommander ..." button. It was always the same! So I looked in the menu window / options, then Display tab of FSC10 and I saw that the boxes "Save / Reset Map / GPS / NavData window position" and "Open GPS and NavData together" were checked. I unchecked them, I redid the previous procedure and there everything went in place. I found the GPS window and NavData. Thank you for your help. Regards, herve31.