I had to release a bugfix version. It seems the Poloniex API handles false nonce values a bit differently now.
The effect was if at some point the nonce was going off the application stopped working.

The next Version will be a complete overhaul of the current App since the app crashes way to many times for my taste.
I partially blame the new "in process background task" feature which seems to have some flaws, and the fact that this is my fist step with WUP.