I was able to reproduce this problem with - Ad-Aware anti-spyware. I also noted that after simply removing the Ad-Ware application that the problem remained. It appears that LavaSoft also installs a secondary application called 'Web Companion". After uninstalling Web Companion (from Lavasoft) I was able to launch the UE tab with out any problems.
I assure you we’re still looking into all of these cases and doing our best to find the underlying problems. Let us know if this solved the issue for anyone using LavaSoft software; we’ll continue investigating other software as well.
Thanks!