And thus my dark hidden plan of turning this porn forum into a programmers' forum was started.
xD
Using unren shouldn't be so hard. As long as it is pasted in the right location and as long as the game ships its libraries the standard way the result should always be the same.
I'd understand if you were using some old-ass windows version and you got an error saying you lack powershell, or something like that, but if it only says that it doesn't find python.exe then it means you either put unren in the wrong place or your game folder wasn't properly extracted.
Did you extract the archive and put unren in the game's root folder as illustrated in
@JohnDupont's screenshot?
Anyways, as an alternative you can do the following manual procedure to enable the console: go into the game's folder, then \renpy\common and open 00console.rpy in a text editor. Find the line stating config.console = False and change False to True.
Save and exit.
If it doesn't work or you can't find said line, then the changes to that standard file might not have been reverted and you'd have to copy it from a standard Ren'Py build.