Followed the Removal and Reinstall fix. At step 5 (devenv.exe /setup) the error "The operation could not be completed" is shown. "Enable NCrunch" is still greyed out.
Uninstalled visual studio using the visual studio installer. Reinstalled, (selecting only "Asp.Net and Web Development" and using all defaults). Rebooted, reinstalled NCrunch using MSI. "Enable NCrunch" is still greyed out.
Found the VS log directory at %temp%/VSLogs, can't see anything relevant in there
Just to reiterate, I'm on windows 11 and VS2022 Community, if that makes any difference.