My USB drive where I keep my formula folder changed 
it's letter.  Now when I try to go and change it in preferences it asks if 
I want move it from the old (which I don't) but when I say yes it refuses to do 
it because the old file doesn't exist.  Is there a work around for 
this.  Do I need to go into the registry? Should I recreate the old drive 
and folder?  Would be nice just to make one entry without having go through 
the motions of copying.
Thanks.