This is the worst feature of  Quickbooks. We run into this problem all the time. We are held hostage from using our program and every time we update we have to set aside time to call customer support in hopes someone will be able to help us because we no longer are able to use QB on different computers after the update. It is absolutely unacceptable to have this program function like this. When we see updates it means we eventually will not be able to use the program for minimum one-two days. I've read this thread and it is so disappointing to see no help given.