I used what DH calls their "easy mode." I noticed that, under the "advanced mode," there's the latest version number posted under the WP logo. So I removed the previous easy install (it doesn't show the version number, and directs me to a version which is, apparently, outdated), thinking I would simply install the advanced. But there's a bunch of stuff to fill out down there, and, yet once again, I'm just not filling in answers the machine likes.
Seems like there's really no point in building on the old platform?
Anyway, maybe tomorrow I'll send them an email and ask them to make sure the latest version loads with the easy mode.
Where, btw, do I go to send an email to their 24/7 email support?
And thank you, Scott, for all your help.