Staunch user of your keyboard here. However with the recent update I have not been able to use gesture typing so I installed the .so file from /system/lib/ - it then mentioned the library was installed, but gestures still wouldn't work. I removed the library, then reinstalled it, but now the app now says it is incompatible.
So I tried downloading Google Keyboard, extracted the same .so file out of the APK and used it - after it asks me to restart, when I return back to the gesture installation screen - it says that no library is installed, but the 'Remove library' button is available. Gestures wouldn't work either, and so did text prediction. After it was removed, the latter worked again.
I have the same question as @tijuanacartel
as well - which library can we use for the swipe function to include the Spacebar button?