Was at a loose end so decided to run WR.
When I first opened it there was an error message at the top but as it was overlaid I was unable to read it.
Reinstalling the program got rid of the error message.
I used Option 5 to create a registry back up and ran the Pre-Scan, which found quite a large number of Reparse Points to repair and which it did.
Created another registry back up and ran the main repairs.
Watching them scroll through quite quickly I was able to glimpse a number of file not found or access denied.
After completion and the reboot, while everything appeared on the screen of my Toshiba Win 7 x64 HP laptop, nothing worked - everything was frozen and had to do a power shutdown.
This was the same after a few more reboots which included a cold boot.
I had to boot up into Safe Mode to open the program to use the registry restore before it would work normally again.
I had this same problem with 3.9.3
When I checked the logs, they were mainly repair error logs rather than repair logs.