This release fixes some issues in the 4.0.2 release that have been reported.
It also includes an updated firmware, which addresses a bug in Samsung 2016+ models that powers on the TV randomly. You don't have to upgrade the firmware if you have another brand or an older model.
The wake up feature is disabled as a result, when a Samsung TV is detected. You can no longer wake up the PC if it's in standby or power it on when the PC is off (with an Intel NUC adapter).