Launchbox still works just fine, in fact it doesnt care one jot what your file is it will import anything. Are you getting a "0 games imported" message? If so then that is because that game is already imported, and possibly hidden for some reason. So either find where the existing entry is, or on the last page of the import wizard click the "force import duplicates" box, this will do as it says but you will of course have two entrys of the same game then.