We provide on request (from the helpdesk http://help.yoyogames.com/) an executable that can be used to install an educational license on any machine, this is a simple executable that when run on a machine it will upgrade GameMaker to the Standard version. This should be done once per machine by the administrator, the executable should not be accessible by anyone else.
NOTE : The LicenseStamper needs to be run with administrator privileges to work correctly. (Press Start->Accessories then right click on the Command Prompt icon and select Run As Administrator, then run the licenseStamper executable from the command line)
The LicenseStamper is a .NET application and requires .NET v3.5 to run.
Any further problems please contact the Helpdesk at the above link.