Registered customer are entitled to free upgrades during one year from the date of purchase. It means that during one year you can download and install the latest registered versions of ASTRA from our site. If you don't want to purchase an upgrade, you can use the program forever; it will never expire, but you won't be able to use the latest version. If you purchased the software more than one year ago, you are no longer entitled to free upgrade; however, you can purchase an upgrade to the latest version at a special, greatly discounted price, and this upgrade will allow you to have free upgrades for another year.