Every time a new version comes out, I get it and then proceed to re-download all my maps. It takes forever. I try to copy the stuff over to the new folder, but it just never seems to work right for various reasons. Is there some quick way to get all your downloads to the new version?
if you're on a PC, there should be a folder called triplea, that's placed under your user account somewhere (someone post exact details). If I were you I would keep everything in there. TripleA also reads that folder for maps, so if you put your maps in the maps section of that triplea folder, you can just delete triplea and install the new one without hassle.