I had high hopes for that suggestion! Unfortunately, it won't 'stick'. When I make it default, Apply, OK, it changes to 'is the default', but when I exit, then go back in, it has changed back to 'is not the default'. A restart doesn't help.
If I click on an email link using my AOL browser I get the 'write email' box OK. So, as AOL uses IE for its browser, I uninstalled AOL. Still the same problem.
Another symptom of this is 64 IE windows builds up in the taskbar in less than a second.