Problem

In Word the CitaviWordAddIn.docm template was disabled and is now appearing in the Word options in the Inactive Applications Add-ins list. As a result, the Citavi Word Add-In is unavailable.

Solution

1. In Word, click File > Options > Add-Ins.
2. In the Manage drop-down menu, select Disabled Items and then click Go. Select  CitaviWordAddIn.docm and click Enable.
3. Restart Word.