Update 6.0.3.6 broken

Those are startup messages and shouldn't matter for this issue. So nothing new (top of the list, or bottom of the actual log file) appeared in the log after you tried opening UI3 and the app?
 
All good here except for a strange new message in the log file Missing Windows Security "Virus & Threat Protection" process exclusion for BlueIris.exe, that I never noticed before!