SB Pro worked fine till I upgraded to 2.546 First I got the error about 4.20 Downloaded the software, installed then I got: “Codemeter error, please ensure your CM stick is firmly in a USB port” When I plug the stick in, my computer sees it and brings up a page labelled: “Codemeter” Seem the computer can see the stick, but not SB pro 64bit computer with Vista Fart meet brain, realized that 2.546 is a patch for the upgrade version of SB, must save my profile stuff and reload SB back to previous version, silly sod that i am. Warning having childern will melt your brain cells!