You can demo our latest stable release as it becomes available.
Please be informed that, there may be other users logged into the demo at the same time as you, who may be editing and making change of settings at the same time while you are testing. Add-ons are value added service which can be activated based on your requirement if ordered. Generally addons reside under Modules sub-menu of Admin area. This can lead to unexpected results, but please be assured it's not an error!