Hi Jordan, I'm sorry the addon is not working for you. It sounds like you're experiencing the same issues as Carlos, so I can recommend some troubleshooting steps, if you are still interested, and you can follow up with me on Github, Mastodon, BlenderArtists or spectralvectors.ca:
Hopefully something there helped, and the links to contact me are in the 'Help & Support' section above, thanks for trying the addon, sorry it wasn't a smooth experience for you!
I can't install it. I always get an error message: Register Class(...): Already registered as a subclass 'RightMouseNavigationPreferences'