I need to provide access to the tutorial videos

The config screen for the plugin requires that I "register this domain" (http://nikflorida.com) with my WPMU credentials. I THOUGHT I knew my credentials but the system does not appear to be accepting them (I can't actually tell exactly because I don't get an error, but nothing happens)

Supposedly the plugin puts a link on my "top" menu... but I can't figure out where it might be... (the site is a mess, incidentally, because I'm just setting it up)... I basically have no idea how to do this... I feel like the answer to my question probably is "RTFM" but I don't know where one is... I guess I just need to be pointed to the manual (or instructions, or whatever)... thanks!