This upgrade package is only for users who had purchased 'CSV Category Export' and still has an access to the latest versions of that extension. If you do not have the access to latest versions of 'CSV Category Export', do not buy this item, it will not work for you. Instead, you should buy a full version of 'CSV Category Export for Opencart 2' at this URL:

http://www.opencart.com/index.php?route=extension/extension/info&extension_id=25504

The 'CSV Category Export' extension for Opencart 1.5.x versions is available here:
http://www.opencart.com/index.php?route=extension/extension/info&extension_id=20652

If you have any questions or notes regarding the upgrade procedure please post them in comments, I will reply to them directly at your email.