Outlook 2007 -Removing an add-in that no longer exists?

Outlook 2007 -Removing an add-in that no longer exists?

Solution 1:
Delete "extend.dat", because the add-ins are cached there.

Go to My Computer (Windows Explorer)

Navigate the menus through: Tools | Folder Options | [View] tab | "Advanced Settings" section | Hidden Files and Folders

Tick (x) Show Hidden Files and Folders, and click [Ok]

In Windows Explorer, navigate to C:\documents and settings\{username}\Local Settings\Application Data\Microsoft\Outlook

Delete "extend.dat"

Close Windows Explorer, and reopen Outlook

Solution 2:

Use the Outlook 2007 Trust Center:
Open Outlook

Navigate the menus through: Tools | Trust Center... | Add-ins (on the left)

Ensure "COM Add-ins" is showing next to "Manage:", at the bottom of the dialog

Click [Go...]

Untick "[ ] The offending extension"

Click [Ok]

Restart Outlook and verify that it worked.