If you'd like to be notified whenever someone who has already submitted a form does one of these two things, you can now do so:
a) Edits their submission, or
b) Adds a comments
To set up these notifications, go to
Applications - Types
Edit the Type you wish to receive notifications for
Scroll down
Find "Users to alert via email when an applicant edits their form" and select a user to be notified whenever an applicant edits their submitted form
Or to be notified about a Comment made by an applicant on their form, use "Users to alert via email when an applicant adds comments to a form"