I was not able to change the folder where VisualAssist stores its data from C:\\Documents and Settings\\Maarten\\Local Settings\\Application Data\\VisualAssist to my G: drive.
I followed the instructions from the FAQ. I closed all IDEs and in
REG:\\HKEY_CURRENT_USER\\Software\\Whole Tomato\\Visual Assist X\ I created a new value (SZ_EXPAND) called UserDataDir with the location of my new folder, but this did not work.