now i have the opposite i cannt add anything to the downloader. i got it set to run as admin
Try right clicking on it on the systray and exiting it, then trying to download again. Occasionally the downloader has a glitch or two of some sort like that which closing it and restarting it usually works around fairly well. They update it from time to time and fix a lot of those problems too though. I haven't had a problem in quite some time now so it's usually pretty reliable.
If you have persistent problems though which you can't easily resolve like that contact GOG support as they are fantastic. They always seem to resolve issues right away or in the case of the downloader they often have a workaround or fix it in the next release, and they're very courteous. Sometimes they even throw in a free game or two. :)