I'm using ICAD 8.4 Premium Plus x64 and Windows 7. Previously, I could repeatedly select entities by clicking each one with the left mouse button. Now I must press the control key to select more than one entity. Previously, I could surround or cross multiple entities multiple times to select them all. Now the original group selected becomes unselected when I try to surround or cross more entities, even with the control key depressed. I didn't consciously change any settings and I don't know how to get the multiple selection function working again. Does anyone know what to do?