Assuming your version of MEP is relatively current and assuming the laptop has Windows 8 and your version works with Windows 8 (if you have Windows 7 then there should not be a problem)
On your new laptop:-
Log into your account at Magix.com - link is top right of the webpage.
Once you are logged in select My Products from the left sifde of the page.
You will now see your registered product(s) and serial number(s) and a download link - download the software and install it.
To uninstall from your old computer open the Control Panel and look for Add/Remove programs or Programs and click it.
From the list of installed programs select MEP and then click Uninstall/Remove