The ReBirth RB-338 ReFill To fill the gap left by the now discontinued ReBirth application, Propellerhead Software presents the ReBirth ReFill! A 100 mb monster ReFill that not only recreates the sounds of the original application, but also of all of the Mods that were available on the Propellerhead website. The ReBirth RB-338 ReFill can be downloaded, free of charge, from the Propellerhead website ReFill section by all registered Reason users.