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If you have received a new license key or are upgrading from an older version, follow these steps:

A single client license can be used on Windows, macOS, or Linux, provided it is only active on one machine at a time. How to Update or Register Your License Key securecrt 81 license key upd

Before installing a newer version over 8.1, visit the Update Policy page to see if your current serial number qualifies for a free update. If you have received a new license key

When you purchase a license from VanDyke Software, you receive a for the version current at the time of purchase. This typically includes: securecrt 81 license key upd

Access to email-based technical support for the duration of the maintenance period.