It sounds like the USBUIRT.DLL was registered by MC10 and that prevented registration by MC11. Reinstalling MC11 now is worth a try.
MC11 will coexist with MC10 IF the MC10 is the latest build.
That’s what I got right now, the latest build of MC10 and the latest of MC11 both installed but I only have one at a time running. I have unregistered the plugin for MC10 and registered it for MC11 only then I tried it the other way around, then both, no combination will get it to work now. Two days ago i only had MC11 on my machine and the plugin was definetly not registered by MC10, I manually unregistered before I uninstalled MC10, then yesterday I did a clean install of MC11, then MC10.
Right now I battling with the cover art, since I did a complete uninstall and reinstall I have to rebuild my artwork thumbnails and this time around MC11 will only retrieve about 30% of my collection from the internet, the manual adding work around is extremely time consuming, so I have to get this done first, then I will troubleshoot the remote plugin again. Something cant be right about this new build 11.1.183, the old one found much more, this one will not even find very common artwork like AC/DC back in black, that’s never happened with any other build I’ve tried.
Any tips to get my cover art back quicker, my backup library only attaches the cover art that was inserted by MC11 via the internet, it will not attach the 70% that I manually downloaded and put in a different directory.