This is probably a silly question... When I purchased my MacBook a couple years ago, I also purchased Microsoft Office for Mac. I use this software regularly with my work. I am giving thought to purchasing an iMac, but plan to keep the MacBook for a portable/travel machine. Can I install my current copy of Microsoft Office onto the new iMac? Or am I going to have to purchase another copy in order to get a fully functioning, registered version of the software on my new machine?