All Customers who purchased Sudoku Up (full version or upgrade) after March 24, 2019, will receive a free upgrade to the latest version 10.0. An email will be sent to all Customers eligible for the upgrade.

• If you do not remember the date of purchase of Sudoku Up OR

• If you have not yet received your Activation Code via email from TreeCardGames.com,

Please complete the form below:

Required information

Your Name:

Your current Email address:

Email address at the time you purchased
Sudoku Up:

Optional information

Order Number:

Your City:

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Please enter as much information as possible. Enter only one email address in the "Email address at the time you purchased Sudoku Up" field. Also, please ensure that the email address (es) provided above is (are) accurate so that we may answer promptly.