Sometimes you may archive a form in error. It's gone from your iPad(s). What do you do? The solution is to unarchive it.
How to unarchive a form
Unarchiving, step-by-step
Visit the "My forms" link, after signing into the web portal.
Select the form you'd like to unarchive.
Click the "Unarchive form" button at the top of the screen, or in the right-hand sidebar.