Doesnt Work!
Luckly I tried on a few contacts before doing a full sync! It messed up by putting the picture of 1 contact to another with similar name (different phone number). It also doesnt pop up a choice between the current and a new pictures. Finally, if you choose Select All, you cannot unselect any contact (once you scroll it is selected back again against your will). I Gave up!
GutoZZ about
Contact Picture Sync for WhatsApp, v1.4