I have got the same problem. I am using last version (188.8.131.52).
So I applied the proposed procedure (purge and reinstall) two days ago and it worked. But my desktop organization was lost.
Today I started redefining my fences and moving my icons where appropriate and... crash! I run into the same problem again. I happened while redimensionning a fence.
I think version 184.108.40.206 is quite unstable. I wait for next version, hoping this will be solved.