I never had to unlock it, I loaded Kodi 16 rc3 on my Windows 10 PC, installed loader and nfusion loader, installed Exodus and a few other Apps and Kodi automatically went to my tv settings and took 1080 HD setting it was set at. I believe it does this in order to conform and play at a compatible resolution of the monitor or tv that its going to be used with. If you go to "Settings" in Kodi and check your system settings, it should provide some video, audio settings that you can use advanced settings to configure but I just can't recall all the settings there. I know when I had a monitor connected, Kodi showed 720P which is why I "think" Kodi automatically adapts its settings to whatever its connected to ?