I honestly don't think it's your OS, more probably you doing something wrong. (Like the guy I wrote this for. He found the issue and it's working now)
So the steps to install is these...
The correct downloads is in this post.
Follower Renpy download
I would delete all you all other versions of follower, (The unity version is very buggy, so delete as well)
Then redownload and install.
You should do the following.
1) Download the base program. (0.1.1)
2) Download the patch and copy it into the game folder.. your version should now read (0.1.6) Confirm files to overwrite
3) Download the Hints.txt file copy into Game folder. Confirm overwrite
The files are probably *.zip or *.rar . In that instance, you need to unzip it first. so you then need to copy the files (NOT folders) of the files you just extracted for nr. 2 and 3 to the game folder of the game.
Unfortunately I can not give better instructions then these. There is no reason why this should not work on a standard Windows PC. Especially if you are playing other unity games on your pc.