Hi—I’ve been trying to solve this same issue, and Venutius’ plugin works great, but I’m running into is that while the plugin active, the Groups page seems to vanish—it’s no longer listed on the Dashboard menu, and if I try to navigate directly to /wp-admin/admin.php?page=bp-groups it just returns a blank page. This happens even when I’m logged in as Administrator.
Not sure if this is a bug or a conflict of some kind, but any thoughts would be much appreciated.