Hello,
I had a similar issue (Launcher crashing when I changed RGB value) and was able to fix it:
First, I noticed that the maintenance tool did not have access to certain folders, even though it was run in administrator mode.
I deduced, through some trial and error, that not only does the maintenance tool need to be run in administrator mode for the update, it also needed to be in admin mode for the initial install.
With that it mind:
0) Backup all of your fonts to a directory that isn't the UltraSabers install directory, if you haven't already
1) Use the maintenance tool to uninstall the launcher.
2) Reinstall the launcher (v2.19),
running the installer in administrator mode.
3) Set the launcher to always launch in admin mode (right-click launcher, go to Properties, under Compatability tab, and make sure to click 'Change Settings for All Users' before you check the 'Run as Administrator' box)
4) Launch the launcher (in admin mode, as discussed above)
5) Plug in your saber and wait for it to connect (I'm not sure how necessary this step is, but better safe than sorry)
6) Run the maintenance tool (in admin mode) and select Upgrade, then start the upgrade.
7) If the launcher is still running, close out of it and relaunch (in admin mode, I sound like a broken record here)
The launcher should work normally at this point. If not, wait for word back from UltraSabers on a fix.
Hope that helps.
Yours in the Force,
DubTak