Since X-ATC-Chatter 1.6.2 we have split the distribution of clips into three separate ZIP files due to the increasing number of clips being collected. In order to install the additional clips you need to follow the instructions in the User Guide. Watch the first tutorial to see how to install / merge the additional regions.
https://www.stickandrudderstudios.com/x-atc-chatter-tutorial-videos/