problem solved:

I tried the different installers (32bit, 64bit, installer, zip).

with the zip it's working normally.

several months ago I installed version 5.4.0 or something and updated a lot of times. I think the bug has something to do with that.

the left click bug still appears, when I ...

right mouse button for crafting 5 items works.
shift + left mouse button for crafting all items works.
but left mouse button for crafting 1 item doesn't work.
everything where you need the left mouse button works normally instead of crafting 1 item.

I took a fresh reinstall and the buttons in den ...

I really like the electric network overview released in 6.0
After realising that I'm looking up my elec. statistics all the time I thought about how it would be, if the network window was a static window any time.
So I used the mighty and powerfull microsoft paint to make some brainstorming and put ...

Build a railway circuit with two train stops, one stop on the right and one on the left side of the track.
Start a train until it stops at one of the stations.
Remove the train stop which is holding the train and the game will crash.

I know the wiki says how to build the train stops to make the ...