When I select ModernMT, I get this error message:
"Metoden hittades inte" meand "The method was not found". (Why "method"?)
Might be wrt contacting the deveoper Mats Linder...
OK ; will do.
In case someone else should encounter the same problem: Mine was solved by uninstalling the plugin, restarting the computer, downloading the plugin (again, although I don't believe it was updated since my latest download), and reinstalling it. Then it worked fine.
It seems this MT provider has some very interesting features. I'm looking forward to exploring it.