Might be doing something very dumb here.

Need to transfer my Contribute 3 licence to another Mac but am having problems
deactivating it on my current machine.

Knowledgebase suggests I go to "Help > Transfer your software licence" and
follow the instructions.

One small problem: there are 7 items in the HELP menu on Contribute 3, none of
which read "Transfer your software licence"

Any ideas?