We made a change in iTest 4.3.1 to streamline the installer. We listened to our customers when they said they were unhappy with the time it took to install iTest. As part of this streamlining we removed the iTestRT files from the installer and made them available as a separate download. The reasoning was that most users who want to install iTest, need to install either iTest GUI (for users who want to author) or iTestRT (in regression machines), rarely both. For the select users who want to install both, we made the iTestRT files available as a separate zip for an easy install.