Not able to open .mogrt with media replacement

Even when updating to the most recent version of the beta, I am being told that I need a newer version of the software to open this .mogrt. The .mogrt is the one attached in this article about the new media replacement feature: https://community.adobe.com/t5/after-effects-beta/feature-focus-media-replacement-for-mogrts-and-essential-properties/td-p/11508035?page=1