I'm really happy that you like the theme. ❤️ Because of a minor issue, the theme wasn't enabled for the next version, and I didn't have internet access for around 3 months due to internet outages in Iran, so I couldn't fix it earlier. I've fixed it now.
I need 5.1 support for this theme. I don't really like the default Blender Dark; this extension is so much better. But for now, I'll have to use 5.0 so my eyes can be more relaxed.