I didn't have enough space in root so I flashed, which gave me lots more. Now XFCE is working nicely.

Edit:

However, after I spent a few hours reinstalling most of my programs, I made the mistake of choosing the menu option that I took to mean start XFCE on bootup. I thought that would be amusing.

It was amusing. I am now perpetually rebooting, which means that I get to reflash the device, reinstall XFCE (If I decide to) and reinstall all the programs I just spent hours reinstalling.

There shouldn't be a "trap door" menu option that forces reinstallation, or it should be marked with a skull and crossbones.