Yes, I suppose I don't understand. As I am not using W7. Everyone else that followed the steps in the fix have it working fine. So I guess yours is a one-off case.
And now, 1.25 does not allow you to select where to install it. So yeah, you'll be stuck with the default location until Mirillis decides to give you back that feature.
- np
As for still getting the error, sounds like you didn't run through the CCleaners registry portion, before reinstalling. Please see the original fix again. Step by step.