I have a computer with Windows Vista Home Edition & we use Quickbooks Pro 2012 on it. It has 1 user license. I'm getting ready to hook up a new computer with Windows 7 onto the home network. I am going to share the folder the Quickbooks database is on in the Windows Vista computer so the new Windows 7 will be able to map a drive to it. When I install Quickbooks Pro 2012 on the new Windows 7 computer, I need it to be able to use the same database through the mapped drive to the Vista computer. My question is, do I need to buy or upgrade the Quickbook Pro 2012 license on the existing Windows Vista computer so I can have 2 simultaneous connectiosn to the database or can I just buy a Quickbooks Pro 2012 installation with the 1 user license on the new computer?