not giving advice but this is what i did and it worked.
"The Registry Wipe (Crucial)
This is the most likely culprit. Even if you delete the GFAC folder, Windows still "remembers" the old service configuration in the Registry, which causes the integrity mismatch.
Press Win + R, type regedit, and hit Enter.
Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Little_Orbit
Right-click the GFAC folder (and the Little Orbit folder if nothing else is in it) and Delete it.
Note: If you feel nervous about the Registry, right-click the folder and select "Export" first to make a backup.
Restart your computer immediately after doing this."