Hi Vicki,
Hmmm… strange. I’m glad we’ve only go two Add-ons working here!
I’ve reset the Simple Send Add-on… the risk in me doing this is that it has turned it off for you as well as me. So if you’d now please go into the Add-ons area (the jigsaw piece on the left of the icons top right of the Form screen) and check it.
If I’ve deleted your settings then go in a place them in again, save and it should be fixed.
Another thing to check would be that the Sheet doesn’t have notifications set (Tools > Notification rules) under Megan’s log in… though I doubt this is the case from what you describe.
Let me know how you go.
Rob