Smart Keyboard Pro - buy where? (not Play Store)

I have been using S K Pro for 3 years on my Galaxy Note 4, and really like it. However, my wife’s new Android phone is unable to do anything on Google Play Store, after hour’s of trying.
Is there somewhere else we can go to buy, and download SK Pro?


I think it must be possible to go into filesystem on your Galaxy note, and fish out the apk. Then just install it on your wifes device.

I guess not. Extracting the APK should be possible, but licensing…