If you want to test SNAPSHOT build, you can download it from here.
Follow this tutorial to upgrade from old version.
gpio shutdown from within mycontroller?
Cant get OTA to start
How to delete a sensor variable from script
How to receive a notification when a message has no Ack
Unable to retrieve data from any node
OTA/MYSBootloader & IDE upload
More information about Cmd=4 messages (stream messages)