I made a new installation to test it. when you first download and extract the game the contextual button is set to Lshift. it switches back to F if you hit "restore defaults".
Before screenshot: https://imgur.com/1TqfI61
after screenshot: https://imgur.com/E3n4kYw
this isnt really a problem because the key rebinding in the demo puts even some AAA games to shame but i thought you would want to know