I decided to see if I could download it again from a different site. I saved it in a different folder than the first time. When I went to get it afterwards, I found two versions in this second folder with a slightly different name (I think one ended with 1.1 and the other was 1.1b, which I believe was my second download). I can't imagine now the first one got there when I downloaded it to the first folder (that one is still there, I didn't accidentally use the same folder).
Anyway, I installed what I think is the first version and from this copy it worked! It automatically got all of my bookmarks and mail from Netscape (it asked if I wanted it to copy my profile and took a little while to do it). I had just finished setting up the mail when I was informed of 1 new message - and it was the notification of a reply to this question that I posted in the WordPerfect Forum!!
So, apparently all is well!
(I'm still doing this with IE, haven't tried it with Mozilla yet.)