Word 2007

Open Word and go to the Word Options ribbon:

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Select Add-Ins from the menu and go to the Manage drop-down list. Here select the Disabled Items option and press the "Go..." button.

A new window pops up. Here select the "macrobond office add-in" and click the "Enable" button.

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Press "OK". After restarting Word, the Macrobond tab should be available again.