they removed that 'ephemeral' override setting in the latest version. 71
but there is another workaround.
create a text file of the following, and call it something with a .reg extension. then double click it in the folder where you saved it.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google]

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome]
"DefaultPluginsSetting"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\PluginsAllowedForUrls]
"1"="http://apps.facebook.com/*"
"2"="https://apps.facebook.com/*"

one perhaps should change those last 2 'wildcards' to be /lostidols/* and /bushwhackertwo/* of course with both http and https

for players who ARE NIOW again inundated to having to allow flash each and every time that they open the chrome browser and try to play this game. every time.
a prior solution to a prior change worked till this version.
that was as follows http://forum.codenameentertainment.com/?thread_id=23878
but google hated that everyone was overriding their dictatorial denoucement of flash and removed that ability in this version.
the above change is a windows registry change. you can do in the registry itself, or as i said though that .reg file that i direct you how to make.
or just do not use chrome. tell google to stick it.