Technically this Prologue is an extension for Ch.10 and a bridge to Ch.11 which will follow it. The addition is a few extra scenes in Ch.10 after Seymour's photoshoot (or threesome with Louise and Jeremy)Ok, I have version 10.2, which says " v10.2 - Chapter 11 (Beta) "
But it stops exactly at the end of chapter 10. It shows chapter 11 logo and stops. No prologue, no anything, just "to be continued".