All used HUDs and popups, as well as user settings are stored in Config folder in Hand2Note installation directory (C:/Program Files/Hand2Note/ by default).
If you need to save the settings before uninstalling Hand2Note, just make a copy of Config folder and save it in a safe place.
If you want to share your HUDs or settings with a friend or transfer them to another device, it is also enough to make a copy of Config folder and put it into Hand2Note installation directory on another computer.
See also: