Don't worry! You made a very useful tool, I will wait for the hotfix!
Viewing post in Palette Helper 1.3 - an inbetween update comments
Words can't describe how embarrassing this is. I made the change, I commited it in Github Desktop application, but I didn't push it to actually make the change. So the 1.3.1 hotfix was identical to 1.3.0.
To be absolutely sure it works now, I've replaced my working file with the one I downloaded from Github.
Version 1.3.2 WILL work now, I'm like 98% sure of it!
I am so incredibly sorry for the inconveniences I've caused!