There are problems with all of the listed images. For example, when I click on Armbian Xenial 5.59 4.4.152 , I arrive to Armbian_5.59_Xt-q8l-v10_Ubuntu_bionic_default_4.4.152_desktop.img.xz . Pay attention to the 'bionic' part in the actual file name instead of Xenial. I tried this image, and it kinda works, but is not usable in practice. When the image boots, first several lines of the boot log text screen look normal, and then something happens to the font (as if there is significant phase shift in the pixel clock), and the font becomes practically unreadable.
By guessing I managed to enter root and regular user passwords, and the boot process arrived to graphical desktop stage, but the font problem persists. So I stopped trying this image.
"Armbian Xenial 5.59 4.4.159" and "Armbian Xenial 5.59 4.4.153" apparently do not boot at all. I.e. I see no text on screen.
I don't remember what the problem was with Armbian Xenial 5.52 4.4.139.
So I decided to try to use Armbian_5.41_Xt-q8l-v10_Ubuntu_xenial_default_4.4.126_desktop.img from the very first post. It boots OK and appears to work, but after several minutes of Internet usage (be it Shoutcast or an attempt to download that media testing script) the whole thing locks up.
I am not yet sure what the real cause of the lockup is. On one hand, today is a hot day, and my board is such that it has NO heat sink on the CPU. So the board can banally overheat.
On the other hand, several days ago I tried "Armbian Ubuntu Xenial 5.59 Desktop - Kernel 4.14.68 (mainline) (eMMC friendly)" from the very first post on the same board with, of course, still no heat sink on the CPU. The board was working quite well for several hours. It was playing music from different Internet sites through the web browser with no lockups. After several hours of testing I simply turned the board off. The ambient temperature was lower.
So I think I need to install a heat sink on the CPU and try again. Just to make things clear - I haven't yet been able to try that media testing because of the lockups.