"error 403 It seems you don't belong here! You should probably sign in. Check out our Help Center and forums for help, or head back to home."
This is the error I see when I try to download the Traveler mod, even though I'm signed into Dropbox. I've tried the methods above and for the life of me, I can't figure out how to edit the file in administrator mode. I'm not even sure that I need to edit the file. The only thing that is in there is:
# 127.0.0.1 localhost
# ::1 localhost
Sorry for being a dunce.

You're clicking on the green download button at the top of the Traveler page and getting that error? You do not need to sign in to Dropbox to download anything here.

It was dropbox that was giving me that message. I've never had problems with this site. I did some overhauling on the computer, including dropbox. That must have worked. I tried again today and it worked, thank goodness.