Newly purchased toolboxes do not automatically show up inside of MATLAB. They need to be installed in order to be used.
Below is a link if you need help installing toolboxes:
How do I install a newly purchased toolbox using the MATLAB Add-On Manager?
If you already have the toolbox installed, then you will need to ensure your license file is updated. The following articles outline how to update your license file:
How do I update my MATLAB license file for an Individual or Designated Computer license?
How do I update the license file used by the license manager?
