This is hard to troubleshoot since I can select 4K on a 4K TV just fine. I know if I connect it to a device that doesn't support 4K it doesn't allow me to change any of those options. So it looks like the box is having trouble knowing what your TV can support. You might try another HDMI cable, make sure it's pushed in right and or a different HDMI port. For testing purposes try plugging it into another TV / Monitor see what options you have.
Thank you,
Alvatech
This is the way the Android OS works in chrome. This is not a bug in the ROM. The right click button on a mouse goes back it doesn't give you a menu. In order to get a menu sometimes you need to hold left click down on text to get a menu. There is an issue in the newer Chrome where only GoogleChrome v.57 gives you those additional options. You can try Firefox browser which works every time long pressing left click. This does not work like a PC this is Android OS it's different.
Thank you,
Alvatech
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