MYSController is a Windows GUI debug tool developed by tekka. It can be used for controlling, updating and debugging a network of MySensors nodes. The latest build can be found in this download: https://goo.gl/48Yn6y
More info can be found here: https://forum.mysensors.org/topic/3453/mysbootloader-1-3-pre-release-myscontroller-1-0-0beta