The Isotope Explorer (previously VuENSDF) program is freeware, and provided you register, you are granted a free license to use the program.
The information you enter will be stored in a database, and it will be used for statistics and for informing you of major upgrades of the program. It will not be used for any other purpose. If you prefer not to receive any email messages concerning the program, please fill in your email address in the comments field instead of the email field.
Thank you for your trouble!
The Isotope Explorer developers
Download from Berkeley without registering