I smell a new update found over here:
whatsup-0.2-1-armv7hl.rpm
(click on the orange "Download Now" button that's on the right side of that page)

Edit:
This update does not contain the "receiving encrypted messages" yet.

Edit2:
Noticed that the app starts a LOT faster then before.
It syncs contacts with fw 1.1.9.28 now