I have a custom form for student registrations - it seems very limiting that it doesn't allow for me to download my results. Currently I have to take each registration email, and type it into an excel file. It's 2018 - shouldn't this be a given to have downloadable results?
Click on the submit button and have it sent to a text file, or email and text file. Then on your websites manager page, under the Edit site button, click on more. You will see a link that says manage forms. You can download new form submissions in a CSV file.