Adăugarea casetelor de selectare la e-mail în Outlook

I tried to follow the tutorial https://www.extendoffice.com/documents/outlook/1632-outlook-insert-checkbox.html#clickable_checkbox

The clickable boxes from word did not work, so I'm trying the trial to see if KuTool will do the job. The Autotext pain does not have the checkbox option. As the tutorial suggested I clicked the import button and got a message saying "When there is already an AutoText entry with the same name in the same category" "Do you want o continue import and overwrite the existing one?"

I figures sure...why not. The existing one isn't doing me any good. So I click yes and get and "Import from" dialog that want's me to navigate to, I'm supposing, the location of the file that will make those promised check boxes.

Any idea where I can find what KuTools is looking for?