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I found out why it doesn't work.

The Apple Store uses com.omnigroup.OmniFocus.MacAppStore.plist instead of com.omnigroup.OmniFocus.plist and the options available in the MacAppStore version are limited.

However, I copied the four missing values and added them manually to the plist and after restarting Omnifocus, it showed up! Success. I am very happy now.