Upgrading from Lite to Pro

[Greyhound]

I am using Gallery Lite now and I'm considering purchasing Pro.  Does the Pro act as an upgrade?  Meaning, does it save all your previous gallery settings, images, etc.... and just add new functionality? 

Or do you have to uninstall the Gallery Lite to install Gallery Pro?

Thanks!

[SMFHacks]

It saves all previous settings and data but you would need to uninstall lite then install pro all data is saved.