@bob3160, were you able to actually boot the drive it created?
Although the USB drives shows all the files, I found that when I tried to boot it, the drive did not show up on my boot menu as it should so it seems the drive is not created correctly.
I never attempted to actually boot from that USB. Sorry, too many other irons in the fire at the moment.
I was able to test that rescue disc:

As you can see, it works. The problem is that Rescue Disc function doesn't give you
any indication as to its progress.
If you don't wait long enough, its possible that you'll wind up with a corrupted USB or
CD. If you've got a 1/2 hr to spare, that should be enough time for it to finish the process.
At that point, simply click on the X in the upper right corner, and safely remove the rescue media.
Or, wait for Avast to fix the problem with the User Interface.
I'm also sending this information to the developers.