• Please download bp-limit-group-membership-per-user.zip file
  • Extract the zip file
  • Upload bp-limit-group-membership-per-user to wp-content/plugins directory
  • Visit Dashboard->Plugins->Installed (or network admin->Dashboard->Plugins if using multisite) and activate BP Limit Group Membership per user
  • Visit BuddyPress->Settings and enter the number of allowed groups. Zero means a normal user can not create/or join any group

Alternatively you can use the plugin installer to upload and install the plugin.