How to upgrade yarn.social running as a vultr app:

• download the latest binary from https://git.mills.io/yarnsocial/yarn/releases
  
• systemctl stop yarnd.service
  
• cd /usr/bin/local
  
• cp yarnd yarnd_old
  
• upload yarnd to /usr/bin/local
  
• chmod +x yarnd
  
• reboot
  

Enjoy!