The native installer is no more available, enjoy using eXo Platform in docker containers.
It is possible to reply to comments with eXo Platform. Discover the user guide here.
eXo Platform is now using a newer Elasticsearch version, the 5.6, discover the related updates here.
The left navigation is now presented as hamburger menu, discover the user guide here.
You already discovered the new functionality of multiple share in activity stream. It has been updated with the addition of a breadcrumb in the file's preview. Check the user guide here.