Originally Posted by corroonb
Thanks, I appreciate your help. Sorry about the confusion.
Oh, don't worry, no confusion, as it does appear that GuteBook is partly at fault as well.
I just tried installing GuteBook under Vista and now see the issue more clearly since the default location is different from WinXP i.e. for GuteBook it is "C:\Program files (x86)\GuteBook" and for GutenMark it's "C:\Program files (x86)\GutenMark".
However, in GuteBook, I assume that GutenMark is in "C:\Program files\GutenMark" which is fine for WinXP, but not so for Vista.
I'll fix that behaviour in the v0.6 release, but in the meantime, just replace the 'gutebook-run.cmd' file in the GuteBook install directory with the one in the attached .zip below (overwriting the existing one).