Space bar and shift key not working - can't complete tutorial!

Some more info about this after being asked in my other thread:

As far as I know there’s nothing special about my environment apart from the lack of Windows Store. I’m not running any third-party AV software or accessibility software which might interfere with keyboard input.

I do use AutoHotKey but none of my AHK scripts capture the space bar or shift key. (I also tried disabling them completely and the problem persists.)

I found a few other people having the same problem or other input-related issues:

Not sure if this will be useful, but here’s a screenshot of the Shapr3D window properties when the window is focused.

If you need anything else please let me know.