One user will update some Excel files that include drawings every month, the default drawing is edit by AutoCAD, Because AutoCAD license will expire soon, so I want to edit by DraftSight, but seems cannot change the default opening software, it still running by AutoCAD.

You can see below screenshot, because the drawing is create/edit by AutoCAD before, and right click this drawing only one option ‘AutoCAD’, no DraftSight option.
Attachment is the excel file, pls help to check this problem, thanks again.