Gremlin launched once, now errors out every time
Installed Gremlin and vJoy, fired up Gremlin and it ran the first time with no issue, but I have not been able to get it to run since. Every time I try to launch it, I get an "Uncaught Exception" error. I've uninstalled, re-installed, rebooted, tried the ZIP version instead of the MSI version. Any ideas on how to fix this would be much appreciated!

The error would indicate that for some reason the XML profile is messed up and causes Gremlin to fail when attempting to load it. If you can create a new profile after clicking ok on the dialog that should fix the problem, if you can't get past the dialog you can open the %userprofile%/joystick gremlin/config.json file and last_profile entry to prevent Gremlin from automatically loading a profile.