Your licence was only valid for 30 days after the creation of the database, since that was 28th September 2009, you now are not licenced to use the product.
So, you must now purchase a full perpetual licence, or another 30 days of use, however you are buying the product.
You are using it at the moment without a valid licence.
Deleting things does not give you the "right" to use the product unfortunately. It would if your licence was valid, but, it's not ;-)
You can though still remove encryption on PC's registered with expired database.
Then you can start another trial and test for another 30-days.
I forgot to add - you didnt get a licence at all - looking at your info, that's the evaluation licence you get when you download the product.
So, either you bought a licence, but forgot to activate it in your EEM, or you've been using the product without buying it since September 2009
Would you like me to get our sales team to contact you ?