So, I have been experimenting with Fences all evening and have figured out what triggers it to shut down:
I purged the installation, and then reinstalled.
As I was starting to organize my desktop icons in folders again, it all seemed to work fine.
Then I added some folder portals from dropbox folders I use to sync files and links between my personal and my work computer.
That worked fine too - until I added one specific dropbox folder.
I then had to purge and reinstall again.
I then created and empty dropbox folder and added that folder to my desktop.
And I started to move links from the original folder that broke it, one by one, until it happened again.
Once I move a pdf file into a sub folder on that folder it broke!
Come to find out that the shortcut link was broken - the file had been moved
That should be fairly easy to replicate and see what the issue is.