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If you are a registered user and have lost your key, or have a key for version 4.0.33 or earlier, submit your registered email address here. Your key will be emailed to you immediately.

Texas Calculatem™ for Windows
Latest version: 6.0.90
Released: 21 11 2008

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Recent Changes: Note to current users: Users of versions 4.0.33 and earlier will need to upgrade your license key by entering your email address below.