See the table below to determine which versions you can update to without charge.
If you are eligible for a free update, simply download that version and activate the software using your existing license key.
If you are not eligible for a free update to the latest version, you may upgrade by purchasing an upgrade license. First, download and install the latest version. Then purchase an upgrade using the link below (you will need to enter the serial number of the license(s) you want to upgrade).
To calculate the issue date for the final year of upgrade eligibility for a 3-year license, add two years to the issue date. For example, if you have a 3-year license with an issue date of Oct-15-2014, the effective issue date for the final year of eligibility would be Oct-15-2016.
Where to find the license issue date
* For Windows versions, the issue date can be found by going
to the VShell application Control Panel About
category. For assistance with Mac and Unix issue dates, contact