Just write to Poly.Play if you bought the game there, mate... :) They will send you the update.
Greets, Tigerskunk
I used the contact form on the poly play website. It took quite some time and only just now I found out that I did receive a response already six days ago, but Gmail put it in the spam folder. So some patience and checking the spam folder regularly is advised. Apart from that great stuff...love inviyya and love the the commitment of tigerskunk. Adding two full levels after release as free dlc is simply lovely...can't wait til their next game.