The Windows version is missing.
Those unlucky who had none of the windows versions are unlucky.
I had the luck to still have the 0.2.0 windows version, figure out, that the icon of the exe is from nw.js, looked up the documentation and figured out how to merge them into a working 0.2.1.
I would upload it but Germany is very strict when it comes to punishing uploading someone else's intellectual property.
I would post the download link I got it from, but it's been removed.
Guide on how to do the same thing I did, if you have an older windows version (maybe you might even be able to get it to work with another nw.js runtime but I didn't try since I didn't need to):
Copy your 0.2.0 folder(we don't want to do it with the original in case something goes wrong) and name it 0.2.1
Download the Mac 0.2.1 and extract it
Navigate to [whatever path you extracted it to]\SabrinaTheHungryWitch_0.2.1_MAC\SabrinaTheHungryWitch_0.2.1_MAC\Game.app\Contents\Resources\app.nw
Select all (Cntrl+A) contents and copy them into your copied folder where the Game.exe is in - overwrite the existing files (that's why you made a copy of the folder in the first step)
Enjoy the 0.2.1, that didn't add all too much content, but we understand that, since they're working on that game pretty much alone if I understood what I found correctly.
We're glad for the gift of getting the previous version, would appreciate it a little more, if we didn't have to do a little digging tho.
A poor freeloader like me can't expect not to have to do a little tinkering :)
I enjoyed A Way Back Home, another game made by them btw.