Try this from a post on the Ubuntu Forums:
Alt+F2 and in the window that opens, type Nautilus
When the file browser opens,right click on a folder and select Open with Other Application and then select File Browser then Open.
You should now be able to open folders in the Places menu.
Hope it works for you.
Mint 15 CinnamonSolydK 64 bitHP2000 Notebook, 4GB DDR3, ATI Radeon 6310