Cheetah Keyboard

[On_Point]

Hi guys, there used to be an app called Cheetah Keyboard which was a keyboard theme app. I had this for years because it has one of the best android keyboard themes ever.
The issue is the app itself has been dead for quite a while, and it's not even in the Play Store anymore. But I am still using the app because I backed up the app from my old phone.
I was just wondering if there was anyway to rip this keyboard theme and use it on it's own?
It's also developed this stupid feature where an emoji is on the top row of the keyboard on the right-hand side. And clicking on this takes me to some a new window in the app where you can buy emoji packs or something.
But clicking on it does nothing because the app is no longer online.
So if there is anyway I can get this keyboard without the app, that would be awesome.