If you have not already downloaded the MathType 6.9d installer, you will need to do so.
The installer is available here.
You will need the product key (shown below) to activate the installer.
To unlock MathType, go to MathType’s Help menu and select "About MathType", select "Unlock MathType" and enter your product key (shown below).
* please contact ITO Service Call Centre(3411-7899 or email@example.com) to request the product key
Please contact ITO Service Call Centre(3411-7899 or firstname.lastname@example.org) if you have difficulties in your installation process.
If you are having technical problems, you may contact the Technical Support at email@example.com.