About upgrade license.

Hi guys. I bought a new sound card (Steinberg UR 12). Cubase AI is coming with
sound card as known. But I installed Cubase Elements 8 trial previously. Now, I want
to upgrade to Elements 8 full version.How can I buy Elements 8 full version
with my AI licence?

Also, Texts of E-licenser software does not seem on the menus. I am using the Windows 7 Turkish.How can I solve this problem?