This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
1.8.4 - TYPO3 LTS 6.2 & TYPO3 7¶
* fixed :: reactivated image and attachment handling on frontend editing * new :: maxitems for images and attachments in tca * fixed :: removed debug output on RuntimeExceptions