Hi all,
There are some interesting comments here - https://forum.palemoon.org/viewtopic.php?f=47&t=24724&start=60#p205984
Basically there is a date check built in to flash,
I have used a hex editor https://mh-nexus.de/en/ to change the date in the chrome version of the flash program using the instructions in the above forum thread.
On my PC the file is located in C:\Users\ <User Name> \AppData\Local\Google\Chrome\User Data\PepperFlash\32.0.0.465\
pepflashplayer.dll
There maybe better/easier workarounds.