helios wrote:What exactly different are they, sorry that I have no idea about different between VKB official download and alex-oz.strana.de, I found this site on other post with similar issue like me.
Alex-oz's site is a kind of semi-official - but still NOT official place to get pre-release firmware.
That said, I feel like I need to repeat: we are only standing by our official firmware, downloaded from our official ftp.
Whatever other versions, even written by ourselves, you may only use at your own risk. We will not be responsible for absolutely anything that may happen to your devices, computer, or the rest of the world, as the result of using un-approved firmware.
ONLY download the pre-release FW when you know what you are doing, or if our engineer tells you to do so in course of tech support or testing procedure.