I’ve found the kona 2 does a decent job upconvert SD to 1080p. you will manually ened to set the settings in the KONA2 control panel you should have installed. If you go to digital out in the control panel you’ll find the up and downconvert settings.
Sadly the kona 2 does not cross convert 720p to 1080p. You will need to look for another solution for that one.