Hi guys I am having the same problem as the poster who also reported this issue, I am getting the same error “an error occurred while trying to replace the existing file. DeleteFile failed code 5. Access is denied”
I have tried as previously suggested unchecking the backup option but this makes no difference in my case, I still get exactly the same error.
P34V4.5, Prosim V 2.25, manual install of FMS data