When I click on "Download" in section 2 it ask for a file in my Downloads-folder, it seems like the download-function does not work (yet).
It only ask you for a folder where file will be saved. You can't set actual filename there. I think button also say "select folder" and not "select file".
And btw: this is one main function of the tool so would be little strange not to be working 
It just writes image to selected USB stick or SD card and creates "install" media.
But writing this same image directly to hard drive is something I'm working too. Needs to check few more things first.
Both are there and this is for RPi2 LibreELEC-RPi2.arm-8.0-devel-20160819220924-r23562-g33aafb5.img.gz
What happens if you type in console
sh /storage/.config/autostart.sh
And as to the windows comment above ... go wash your mouth out with soap for using foul language!
Don't get that part. What do you mean?
And still no information which system do you actualy use (rpi, ...).
You need to configure some settings - like explained in LibreELEC Start a new SSH-Session and run the following commands.
There is no chromium for imx6.
I mean what the problem with autostart.sh?
RC6 is still enabled in kernel as module. As before. But maybe with linux version bump something has been changed.
And btw: on which image is that? Which system? I asked around and Ultra2 with Generic image uses an RC6 remote and still working fine.
If package doesn't compile try with them 
If nothing happen then you didn't copied files to update folder correctly. And update process didn't even start if you didn't saw anything on screen.
Yes, Kodi Krypton supports touchscreens. But it doesn't have any calibration addon (at least I don't know for it). Insteady you need to edit some settings in advancedsettings.xml.
My tslib approach is pre-Krypton and it doesn't involve Kodi.
Now is all ok then?
Yes, this image from #9 post iis correct then.
Why can't you use it to update? What happen?
sakos, calibration addon itself doesn't do anything. It works only if my tslib touschreen stuff is included. And it is not in official images - you need to compile image yourself or check here if someone posted image for rpi.
I tried adding this to autostart.sh to no avail.
And the problem is what exactly? Be sure to have UNIX formated file autostart.sh if editing on windows.
If both script works from console then maybe your file autostart.sh is in DOS format and not UNIX? Use text editor like Metapad for editing.
And to test the autostart just type
sh /storage/.config/autostart.sh
It should work just as when you type both commands separetely.
Posting the content od the both scripts would help.
Does script A.py even ends to start B.py? Why not having only one script?
My second problem is that Kodi restarts everytime I start the Yamaha Receiver
Enable Kodi debug log, restart the cuboxi and then restart receiver. And post kodi log - maybe we could see something.
Good. Then I will build both images from now on.