1.5.0.2 creating directories

I've just upgraded to PFF 1.5.0.2 and when I start it up, new directories are being created in the 'PortableFirefox' directory on my usb key. They look like the directories under my personal Documents and Settings directory on my computer (ie, Desktop, Favorites, Cookies, etc.). Its causing a problem because I download everything to my computer's Desktop and everything is being downloaded to the Desktop directory on my usb key.

The readme file says, "The AppDataDirectory and UserProfileDirectory are used instead of the local User and Application Data directories contained in Documents and Settings. A blank entry for PluginsDirectory, AppDataDirectory or UserProfileDirectory will disable that feature." I didn't see a AppDataDirectory entry in the .ini file, so I created one and set it to blank, but that didn't seem to work. I just want to use the directory that is on my computer, not on the usb key. Any help would be appreciated or let me know if I'm missing something obvious.