How can I upgrade Mikrotik demo License L1 to L4

RouterOS General
1

Dear Mikrotik support ,
How can I upgrade Mikrotik demo License L1 to L4
Today I brought a license L4 which Mikrotik has L1.
when I paste this new Key system–> License .. its not upgrade
I need help regarding this issue.

Thanks
Sajib Nandi

2

Contact MT support via e-mail at support@mikrotik.com … this is user forum so you won’t get direct support here.