Solved automatic decryption errors + Windows and OSX native executable

[09.03.2017] If your WhatsApp is crashing, please take a look here in order to fix it

Enabled auto-installation of Java Cryptography Extension (JCE) Unlimited Strength. The first time you run WhatsappMigrator you're asked if you want to install it. Please make sure to run WhatsappMigrator as administrator (at least the first time, otherwise it can't install the Java extension).