If I down grade my account now, will I lose all of the data in my forms and database?

If I down grade my account now, will I lose all of the data in my forms and database?  We are using JotForm to register quilts for our quilt show.  Registration is over until 2019.  I want to downgrade for next month but am concerned about losing the data I've already collected.

If you downgrade your account now, you will not loose your data. I checked your account and I noticed that you have 475 total submissions and has no uploaded files. However, if you downgrade your account back to Free, please note that Free Plan has 500 total submission limits, meaning if you exceed to the limits, your old submission will be deleted making room for the new submissions. 

I would suggest you download your submissions so that you will have a backup of your submissions data. Please refer to this guide on How to Download Form Submissions as Excel/CSV/PDF? Or you may also want to export all your data at once, here's the guide on How to export all of your data at once.

If you have other questions or concerns, please let us know.
Regards.