No software is needed to charge the battery. Just plug it into an AC-USB charger or one of the back USB ports on your computer, and it should automatically start taking sustenance.
If you’re looking for the manual or User’s guide, you’ll find it here.
If you want to update the firmware on the machine, check this post. Note that there are 2 hardware versions of the Fuze, and it’s important to download and install the correct firmware for you particular model.
If you have any problems or other questions, feel free to join us in the Fuze board. You’ll get help (or at least a reply) quicker by posting in the correct board.