With reference to the post by glider1001 regarding the missing csf.ocx. In my case the file was filed in the FS_Addons folder and not FSX_addons folder. Regsvr32 "C:\FS_addons\PF3\Updates\CSF.ocx" Copy the line above including the ". In Windows 10 - Right Click Start->Windows Powershell(Admin) and ...