You said you purchased it, and you said you installed it but, nowhere in your message I see if you *Activated* it, which seems exactly what you missed, considering the message, which says the Trial has ended.
In fact, using the email you use to register on the forum, I checked your order and yes, the activation key linked to your order has never been activated and, you also purchased GSX and GSX Level 2, and those key haven't been activated yet as well.
So, it seems you haven't realized that, after you install a Trial ( which is the only installer we have ), it must be activated from the Addon Manager menu, using the key you found in your purchase receipt.