Switching engines for requests module

Hi all,

I am trying to use requests module - as the example in DevTools - in an IronPython script and this post suggests it doesn’t work in engine version 2.7.7

I want to change the engine now, but this is the only one available in the settings, even though pyrevit clones engines shows others are installed:

How can I activate/access these other engines? Or is there another way to access requests module?