Hello,
I just updated to hugo_0.54.0_Windows-64bit, but qerying the current version gives me 0.37.1. Same with the extended version.
What’s wrong?
Thank you
That means your commandline is looking at an older version of Hugo. You likely installed it in two places.
I don’t use Windows and can’t troubleshoot this, but for those who can, they’ll need to know how you installed Hugo and how you upgraded. 
SOLVED
sorry for bothering you - I had two copies of executable (one old and the new) and the path variable was pointing to the old one. Now it’s fixed.
Thank you.