@jek-fdrv, I think there may be some confusion about this plugin and what it does.
This plugin is NOT the ACF Repeater Field function. If you install it on ACF5 (free, not PRO) you’ll see there is no repeater option available when this plugin is installed. All this plugin does is add a new feature to ACF’s repeater field allowing each row to be collapsed in the admin. If the ACF4 Repeater Add-on or ACF5 PRO is not installed, then this plugin does not do anything.
This plugin is 100% original code written by me and other helpful contributors on GitHub. This plugin started as an old ACF support forum thread with a suggested implementation of the feature. You can see the plugin’s conception there and development history on GitHub.