Hey Karel, don’t put yourself down, you’ve managed to find the forum, reply to someone, realise that was in the wrong place, find the right place and post a message! So you have skills
The fix is actually simple but may be worded in a way you don’t quite get. Bare with me as it’s been a while since I updated and may not have it exactly right. Fundamentally you need to download a file (click on it) then unzip it which is simply a right click and choose unzip, then copy and paste that file into the folder they state. If you can navigate to this forum topic it’s the same logic to navigate to there in windows file explorer.
I’m sure there are others that can give a more detailed response but hopefully this takes away some of the techie feel to it.
Hope you’re flying soon