@danielmccormick18, I think the best way to do this would be to delete the theme and reinstall it. The features for the theme should not be reset but any of the code modifications will be reset with a reinstall.
To reinstall, you can:
Re-upload the theme via FTP
Download the theme as it is from the theme download page (in your case: https://www.ads-software.com/themes/accesspress-parallax/)
Go to the theme directory (../wp-content/themes/YourTheme).
Delete your theme’s files.
Unzip it on your local computer.
Re-upload the theme to the theme folder.
Through the Dashboard
Delete the theme using the delete button in the appearance tab for the Dashboard.
Click on the install theme button.
Look up the theme and install the theme.
That should be it and you should have the theme back to its original code base state.
