Error "X" is not a valid key name

[breid]

I had a nice working RL setup with Launchbox. Due to a system crash, I had to move it to another machine and another drive letter. Now when I try to launch anything, I get error messages of this sort:

Capture.PNG

I am guessing something in my config got borked with the drive letter change, but everything was set up with referential "..\" style paths, not "x:\" style paths. I've checked through all the RLUI settings and can't see anything that's out of place.

Why does this error message originate and where should I be looking to correct it?

TIA for any assistance. I really don't want to start from scratch again if possible.

[breid]

If anyone was curious, it was file/directory permissions.