I assume you are talking about the temporary location where PRT files are generated before being copied to their destination. There are a couple of factors for this location. See http://msdn.microsoft.com/en-us/library/aa364992%28v=VS.85%29.aspx for the details.
Ahh nevermind, that’s the location where Krakatoa’s settings are stored which is not what I was thinking of. I’m not sure why they are called .Cache files (Bobo could enlighten us once he’s back from Vancouver). I’ll log this as a bug.