Hi Marcin,

Sorry for the late reply, I was busy with the new release of Grabber3 & cstick firmware.

Please give a try to the new version of the stick firmware: https://app.box.com/s/yscmad2c6wpwe8xo7hkz55qha61kt5oh
The archive above contains the instruction for flashing the new firmware, please follow the instructions for "factory reset". You will need the Dynamixyz Flasher tool here: https://app.box.com/s/2ahu44o53n6va02mo3lpcjmh91p6mbmp

This update brings Over The Air update, meaning further update of the stick firmware will be done using a very simple web-browser interface.
To kick instability of Monitor software, you need to connect the cstick to a strong, 5Ghz Wifi network (wifi N). Otherwise there is no enough bandwidth for the video stream.

You need to use this version of Grabber/Monitor to connect properly with the computestick:

https://app.box.com/s/5zz4y685tfeqsvr7v3r4u9tonibcpofo