Retail Software Can I Continue Using My Trial WoW Account If I Purchase The Retail Software?

Can I continue using my trial WoW account if I purchase the retail software? - retail software

I move the World of Warcraft against the clock to pay me, but I see only create options for a guest account or create a new account. I spent several hours playing with the assumption that he would be able to do so. Is it possible? If so, where can I go. I saw in the "Account Management" and "found nothing.