Les - 1.5.0.7 is the version. I've followed all the advice in the other thread you mentioned and uninstalled QT, installing the latest version of QT alternative instead, then in FF set QTA as the program to open all QT-type files - to no avail. Down to my last handful of hair now
One thing, though - when I uninstalled QT you are given a choice to uninstall or not uninstall the 'QT extensions'. Not really understanding what they are, I chose not to uninstall them ... any thoughts on this? Thanks again.