PMR06 -
That's right, there was a bug in version 8.1.0 that caused this. I can't believe I didn't remember that immediately. Looking it up, it appears there was an 8.1.1 update released within a couple of months that corrected this.
Unfortunately, RISA doesn't have those old installs posted to the website anymore. We usually have the latest version on the public pages and then one version back on a "secret" page that we can send out. Since the 8.1 release came out in 2009 (and has since been superceeded by 9.0, 9.1 and 10.0) I'm sure that won't be on the website anymore. If you've got one of the 8.1.x updates on one of your other computers, then you can contact me privately and I can give you some instructions on manually copying it over from the other computer to you newer ones.