if I am logged on to Drive HQ at my primary compurter station but I also need to access Drive HQ from a different computer while I am away...can I do that?  Be logged in at two different locations?  I need to do this b/c sometimes I keep DriveHQ open so that it can continue to upload files at my primary computer station.

Yes, that's the nice thing about our service. You can logon from multiple computers at the same time. You can use our software to backup multiple computers without additional charge.