Is there a 1mb size limit on files that can be attached to Jot Form submissions?

For a new File Upload field that is added to the form, the size limit is set to 10 MB. I think that previously default size limit was 1 MB. 

I inspected your form https://www.jotform.us/form/61454345768161 and I saw that the limit for File Upload fields is 1 MB. Considering that the form was created more then a year ago it is possible that the default size limit was 1 MB when you created your form. 

You can increase the limit or turn it OFF for all File Upload fields. Inside of this guide, you can find how to do it:

Changing the File Upload Size Limit

Hope this will help. 

Thank you – now how do I save the form after I make the change under the options section?
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The form is saved automatically on each modification.