Ask of Reactivate my soft licencer on my new computer

hello, with my audio interface (presonus), i had a Cubase 6 LE, how was ok, but now i have to migrate my system to a new computer, with windows10
the probleme is to transfer my soft licence to my new eLC program
i have to reactivate and obtain a new activation Code, but i really don’t understand how to do

Could someone help me please ?
thank you very much

Software/license reactivation (requesting new activation codes) – Steinberg Support