I really do not know why Am has gone to great lengths to torture himself by adding a program to a PC that was never designed to be on one
but --- whatsapp is actually a very very good little thing. The beauty of it is that it will run on both your phones data and wifi and once you have a contact in the phone it doesn't matter if they swap numbers, sims etc, if they synch the new numbers to their whatsapp profile one can still message them whenever and wherever you want without even considering their number.
Oh yeah, it seems facebook have given up on trying to get money for it anymore, it is free of charge.