Unable to remove a shared add-in from the Add-In Manager in ArcMap

Description

In some instances, a shared add-in that is listed on the Add-Ins tab in the Add-In Manager dialog box cannot be removed. The 'Delete this Add-In' button is disabled.

Cause

This issue occurs if the shared add-in is located in a well-known folder, which can be a network share. Users are not allowed to delete shared add-ins directly from the Add-In Manager dialog box.

Solution or Workaround

Remove the shared add-in by deleting the file from the well-known folder.

1. Navigate to the well-known folder, for example:

\\network drive\Shared Add-Ins\

2. Right-click the shared add-in file within this folder and select the Delete command.
3. Close the Add-in Manager dialog box.
4. Reopen the Add-In Manager dialog box and ensure the add-in is deleted.