I'm dealing with the same problem. I am using desktop (Mac) program and tried to delete the form (SE-T), but, after the deleting, the form still there with an error marked. Below is the direction that I followed to delete the form. Let me know if there is anything I need to try differently.
- Switch to Forms mode
- In the left pane, select the form you want to remove (if you don't see it, select Open Form at the top).
- From the Forms menu, select Remove [form name].
- Follow any on-screen instructions to remove the form or forms.
