Specifically Typewise which is the only keyboard I know of with hex-shaped keys suited to my fat fingers. Unfortunately it's proprietary. Installed it from Aurora, can't seem to downgrade. Any ideas?

Have a look at attached screenshot. The bottom of the keyboard disappears off the screen. Update was supposed to fix this but made it worse. 😠

EDIT: In case anyone has the same problem, I found that rolling back to version 3020308 on Aurora solved the issue.