Did you sign into the marketplace from inside your concrete5 dashboard?

It's on the right side of the page. I just tested this myself and it seems to work fine.

Note I first signed into the marketplace from inside my concrete5 dashboard and then clicked the link to the marketplace, clicked download then save for later and it appeared in my in my dashboard after.

I just tried your suggestion and I'm still not seeing my themes I "saved for later". Should I uninstall concrete and then re-install?

no, uninstall won't help. Sometimes you might have to reload the add functionality page, or clear your site cache (dashboard >site wide settings > debug) but this is rare these days...

attached is a screenshot of what the right side of the add functionality page looks like for me...

O.K. I tried debugging and still no results. How do I reload the add functionality page?

i just meant reload the add functionality page after logging in with your concrete5 credentials.

are you running your site on a windows machine? I've heard some folks have trouble with auto-install but i think you'd still see the download button...

one thing you could try is simply downloading the file, unzip it, and upload it to your /packages directory.. that should get it in your add page...