I had the similar problem with my webroot AV and firewall.  I turned off the AV and FW and installed the update, and when I turned it back on and went to use the ACE, it blocked it and automatically deleted it.  I called by tech support and they were able to add that ACE to my permitted sites on the webroot site and now it works even with the AV and FW on.  You might want to investigate that.  Steve