Blimey,
I haven't checked on this mod in years. Had not idea people were still interested. Anyway, I still have the original UR v2.0. Tested it last week and it wont run on my modern computer but does on the old. I have no idea why that is.
I got the modding bug again so I'm rebuilding Ultimate Retrofit for those people that just want a simple m2tw retrofit with all the new factions and units or a template from which to build your own mod.
This was the original purpose of UR but it got out of hand, people asking for this and that added. I've got a little bit to finish off, need to deleted portugal, add teutonic order, and script in their correct arrival into the campaign.
Give me some time to sort it and there'll be a working Ultimate Retrofit once again.