thought it might be, vista likes to install things differently
i dont know what the profile files/folder is called for BHD (not installed here), hopefully someone will reply with what the files are called so you can search for them.
could be something like c:\users\yourname\appdata\local\novalogic etc
but i think there are a couple of other possibilities.
either way you could search for 'Novalogic' and see what comes up. i think you might need to show hidden files and folders to be able to search for them in Vista.