IMPORTANT: It is essential to ALWAYS make back ups of your website once you make any big changes. Should anything happen where you delete your website details in error, you will then always be able to restore the last back up you made.
Click on the "file" button on the top right corner and select Backup / Restore.
To backup, click on the Download Backup button.
A box will open, click on save and choose the desired location to save this file. Make sure this is in a place where it cannot be easily deleted in by accident or in error.
To restore your website, follow the steps above, however this time click on Restore. A box will open that shows Browse.... Click here and upload the file you have backed up and click on restore. Once the website has been restored it will open the main page of builder.