[DanCooper]

Dan: Would a complete reinstall and setup of EMM be worth trying?
(in a new folder) 

Why not. You can copy the Profiles folder from your old installation to the new one. You should do that before you've startet the new installed Ember because than the profiles folder isn't existing. As always don't install Ember under Program Files because of the right issues with some kind of Windows user rights.   

Sadly that resultet in the exact same problem.
Installed EMM to a new folder
Copied the Profiles folder from the old installation to the new clean install
Started the new EMM - and ensured that Collection ID was enabled under TMDB.
Rescraped "Bourne Surpremacy"
Got the same error log

So either it's something in the Profile folder that's corrupt or something with EMM (?)  

Just tested with "Bourne Supremacy" in German, English and Danish without any error. The Log shows Ember v.1.4.91. The latest is version 1.4.91.1, but the log can't display the last digit (I've to change that in the next release). So are you shure that you use the latest version of the first post? It's not that I don't believe you, but I don't want to look for bugs that have already been fixed. If you are already using the last version, I would like to ask you to send me your "Profiles" folder as a ZIP (Dropbox or similar). Send me the link as a PM.