In addition, existing applescripts which query the cache or modify defaults preferences will not run (without modification) on copies of OmniFocus purchased through the Mac App Store, even if they use a defensive form like

For a hack which should usually enable the AppStore variant of OmniFocus to run such scripts, see this post.

For reference, two related posts:

Network externalities: Appstore-bought OF is worth less

FAQ: Enabling App-Store versions to use existing scripts and hints

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