You can check whether you have the current version of Java, and download the current version of this free software from www.java.com
Java was intended to allow users to run programs in a secure environment. There have recently been some questions about how well it does this. Currently, you can run my programs in the old way, provided you agree to a number of security questions.
Under future releases of Java, it may be necessary to copy my files to your computer if you wish to run this software.