OK, as I understand it a Lion upgrade purchased from the App Store can be installed on every Mac that I own: correct? So here is my situation: I have three Macs, one running Leopard, one running Snow leopard and a new MBP that came with Lion installed. Is there a way for me to use the Lion installation that came with my new MBP to upgrade the old MBP? The only reason that I am considering upgrading the old MBP is to take advantage of the current 1Password sale in anticipation of the free upgrade path to 1Password 4 via the App Store. Ironically, I plan on replacing the old MBP with a new MBP running Lion. But I am waiting to do so until I have sold the old MBP... So I am not interested in paying for a Lion upgrade when I will be buying a new MBP sooner than later. Confused yet? The convoluted 1Password upgrade path now that Agile is moving to the App Store sure has confused me!