did not solve it
Okay I fallow your instruction to the T, I did get the same error and I try to create a new Menu on a blank html page. Did not work ether.
my extension manager was up to date. So what I did was update my latest windows 7 update and updated acrobat reader.
then I Re started windows 7, Once I did this the menu started working correctly.
so my guess is after your instructions I just had to re start my system ..
I Just posted this Cuz might help somebody else..