Thanks. OK; there were no files in Documents\Paradox Interactive\Europa Universalis IV\mod. So I opened the game and went to the workshop content from there and then downloaded the "better terra incognita" mod from in the game. That mod now appears in Documents\Paradox Interactive\Europa Universalis IV\mod as a .zip file which I cannot open without buying winzip for $29.95. Is there a work around to open the .zip? No other files are in that folder.