In order to export/download your Theme settings you will need to deactivate Root Folder BulletProof Mode temporarily and then put your site back in BulletProof Mode after exporting/downloading your Theme settings.
1. On the Security Modes page, click the Root Folder BulletProof Mode Deactivate button.
2. After you have exported/downloaded your Theme settings, click the Root Folder BulletProof Mode Activate button.