Simplest way to disable a layout based script trigger is to use a global variable.
Take the changeLog script and modify it like this:
If [ Not $$TriggersOff ]
#put your script here
In your FH11 script use:
Set Variable [$$TriggersOff ; Value: True ]
at the start of your script to disable the ChangeLog script
Set variable [$$TriggersOff ; Value: False ]
To re-enable it near the end of your FH11 script.