It Seems you closed the issues page on Github only 2 days ago! =[
I had some suggestions in regards to the GUI.
Is it possible for UE Viewer to remember the start up options?
Picking 'override engine version', Changing the engine to 4 and then finally picking the specific engine version every single time gets annoying.
Or even let us specify the defaults in a separate text or startup.cfg file, with all the options of the startup GUI in addition to specifying an AES key.
Cause copy and pasting an AES key every single time isnt fun either.
As im not really a coder the best I could do imake some quick mockup images, to illustrate my point Hopefully it is clear enough.
https://imgur.com/a/NazKM8d