BTW, I have Mint Maya (13) Cinnamon. It's beautiful! I like it much better than the MATE version.
Also, if you've only had Mint on since Saturday, maybe it's good for you to go ahead and upgrade because you probably don't have much changes to make.
The "fresh" install is the best for all upgrades in Mint though, much easier and cleaner. Plus, in Mint, there's a built in BackUp option so you can save all your docs. Go to Menu>Admin>Backup Tool
Linux: Mint 17.3 Rosa Cinnamon 64-Bit
Box 1: Intel Core 2 Quad | 8gb RAM | 500gb WD 7200rpm | nVidia Geforce GTS250
Box 2: Intel Core i3-3240 | 4gb RAM | 1tb WD 7200rpm | AMD/ATI Radeon HD 4550