If you cannot see your name and company details in the Help/Resources -> About DesignSpark Mechanical dialog, please download and run the attached batch file as an administrator. If you are already logged in to Windows as admin, simply double-click to run it.
Make sure DSM is closed. After running the batch file, enter your DesignSpark registered first name, last name and business name (if applicable, otherwise enter: 'Private').
We can confirm the batch file attached here is safe and tested for use.