@Isaac
I uploaded the files in 16-ubbthreads-7-7-1p1
2019-03-02 Update:
A patch to fix "email notifications on PHP 7.1+" issues has been posted to the member area.
A release refresh to fix install issues has been posted to the member area.
So I reckon I'm upto date now and can await 7.7.2 before I upgrade my MySQL version to 5.7 or higher