Hi Basti42, sorry to hear you are having issues, I have tested it in 4.3, 4.4 and nightly builds of 4.5 and I'm not experiencing any trouble - I know that doesn't help you get yours working, but I also can't reproduce your bug to try and fix it!
If restarting Blender or re-installing the Extension didn't help, then please follow up with some additional info, like:
what OS are you using?
what other Extensions / Addons are enabled?
is there an Error message?
what keymap are you using, and have you customized it?
If it's still not working, please create an issue on Github or Codeberg, or a thread on BlenderArtists and I will be able to help troubleshoot for you.
Right Mouse Navigation
Unfortunatly it does not work with the latest Blender Version and above. (4.3 & 4.4)