Most likely those are the build directories and the files are packaged into the executable.
C:\Projects is like the standard directory where projects are created with visual studio.
You could take a look at the source code.
This link will go to that directory and you can browse from there.
Also read this:
I’m still puzzled about the “C:\projects” directory though. Where is that directory structure coming from? Qt Build system? Or is it a default behavior for Qt Applications?