Hi
We can't 101% guarantee, but registry entries (if any) are only created by the installer EXE (which in a no-install scenario doesn't happen / there isn't one). However, we cannot guarantee 100% that folders would not be created in the logged-on user's Windows-profile area, because it depends on how Windows (on that machine) identifies the drive type you are running SB from. There is at least one post somewhere on here (may not be Free, could be SE or Pro) where the user reported global settings & new profiles were stored by default on the PC, because the main EXE somehow was fooled into thinking the drive it was running from was internal.
However, I just checked by running the program from the extracted NI Zip (extracted to a flash drive on a PC without Free; flash drive was correctly shown as Removable in Explorer) and no such folders (or reg entries) were created in respect of it. So if the drive type is identified OK, it seems to do what we told it to...
All I can suggest is try it. Check after running via Preferences > Options > Expert > top section, which should be locked to 'same as program', and the section below it should show SETTINGS.INI as being stored on your external drive. If not, Windows has mis-identified the drive-type to us, and you'll need to clean up after yourself (the top section has an Open* button if so)
(* if it's working correctly, that Open button will - in the NI scenario - only open the program folder on the removable drive. But if not, it will presumably open all three potential locations in a window each for easy deletes)
NOTE: Please don't PM members of staff unless it's to pass on sensitive information that can't be posted in the forum. For one thing it deprives others of seeing the question & answer (maybe via a search), for another it prevents other members of staff being able to see the question exists at all (PM is private internally also) and finally it prevents any of us from being able to link to the answer rather than type it all again. Also, you can't simply scroll back through a thread to see who said what, when & why. You end up jumping from main forum to Inbox to Sent Items to
This applies especially to freeware

c/o the following
http://support.2brightsparks.com/knowle ... ort-policy
http://www.2brightsparks.com/bb/viewtop ... =29&t=9660