I downloaded Metabox Core from my account. I included in my theme's function.php. But i'm getting error message in admin asking me install Metabox's free version from WordPress directory. So, i've 2 questions -
Why do i have to install the free version if i've the paid/pro version?
I dont want to have it included in website as Plugin, want to add in theme. How do i get it worked?
1) The MB Core extension doesn't include the Meta Box plugin. If you don't want to install it separately, you can bundle it in your theme.
2) Please see the link above for the Meta Box plugin and this link for extensions.