When you purchase the Raffle Ticket Generator Online Raffle Plugin, you are granted a lifetime license for use on a single domain and single server.  You can transfer the license to a different domain and server via the control panel on http://online.wpraffle.com.  You can use it as long as you want on the versions of WordPress that the plugin continues to work on.  Updates are valid for as long as you have a current support license.  We offer 6 month and 1 year support options when you purchase the plugin.  You are entitled to any new versions or updates during that time.  You have the option to renew support and upgrades at a discounted rate.  Obviously we are not fortune tellers and cannot predict the future.  A lifetime license does not include life updates.  If you bought a version 2 years ago when WordPress 4.4 was the latest release and you did not purchase additional support and updates, you may need to purchase an update to get a version of the plugin that is compatible with a newer version of WordPress.  For example, in certain circumstances our 1.x and 2.x versions may not work on WordPress 4.9 and WooCommerce 3 due to a variety of security enhancements implemented in those versions.