Okay, the latest tool is attached.
I'm "hoping" it will finally solve the 68xx users problems.
If someone with a single 68xx card is willing, open the tool and do the following:
First, let it backup the profile file to the desktop.
Second, let it create a default file without adjusting the uppers at this time, and let it install into the registry.
reboot and see if you get into windows.
If so, open CCC and see if all the sliders are there, and what the new upper limits show.
If all is good, you can run the tool again to just change the uppers and let it install again into reg and reboot.
If for some reason Windows doesn't like it, boot into safemode, run the tool and do the following:
1. Click the Purge registry button to remove the reg file.
2. run the restore button to restore your saved default profile file.
Since these are the only 2 things touched, a reboot should put you right back where you were before this.
Then let me know if it worked or not.