Hello,

How can I change Winbox version to 3.11 when RightClick in device list>Tools>Winbox in Dude 3.6?

Use the TOOLS menu to define a new tool, bottom of the manual here:
https://wiki.mikrotik.com/wiki/Manual:The_Dude_v6/Tools

Thank you, it is working.

Second question: is it possible to DoubleClick on Device in DeviceList run Winbox tool?

Not possible

Thank you.