I couldn't get it in Safari so I downloaded Chrome and got it taken care of. Chrome is a quick download and you can get everything going really quickly.
But now when I view my PreSonus account in Safari, version 5 and my license are not there. When I view it in my new Chrome, version 5 is listed along with 4 in my PreSonus account. I guess I'll need to keep Chrome just to deal with PreSonus in the future!
Don't know if this is a server-saving strategy or what, but if they're going to make version 5 available one browser at a time, they should post a schedule!