Reading from a file of Webspace

[Raphael Schwietering]

How can i solve this. If i want to sell ea via Website and give the opportunity to Download a Demo. How can it will BE solved that ea didnt work after 30 days. 

I think of a txt or csv file online where i can set the demo end time.l and the ea will Check before start of the date is out of Date. Someone an idea to handle this.