For OS X and Linux, run the following command to update

curl -L git.io/cow | bash

For Windows, please download from http://dl.chenyufei.info/cow/latest

Changes:

• Support new encryption method "chacha20" and "salsa20"
• Avoid biased parent proxy selection for hash load balacing
• Fix AirDrop on OS X when using PAC
• Fix failed start with corrupted stat file
• Support changing the estimate timeout target