It hasn't been easy but our programmer extrordinaire Graham found a fix for the problem one of the recent XP security updates caused Qumana (and other applications as well).  So now there will be an end to the dreaded ERROR posts!  Please download this new installer and install overtop your old Qumana Pro--File- qumanasetup.exe.  If you're a QumanaLE tester, please be patient a little longer.  We've had a little code branching on that application lately and we need to bring things together to get something for you.