There is a sequence of events that you must do in order to reset the add-in.
Follow the steps below, while in Microsoft Word:
1. Go to the directory "c:\Program Files\Wasp Barcode\Add-ins\Word\prog" and run wbcuninstall.doc
2. Open Microsoft Word. Click View->Toolbars->Customize and delete any Wasp toolbars that appear. If no Wasp toolbars are present, continue on with Step 4.
3. Close Microsoft Word then reopen it. Click View->Toolbars. If there are any Wasp toolbars, delete them then Close Word and repeat this step.
4. Go to the directory "c:\Program Files\Wasp Barcode\Add-ins\Word\prog" and run install.doc
The add-in should now work as expected.