Where to add those hack?

[soumya/b/ghosh]

I want to use this

Conditional_Themes_Manager::register( 'twentythirteen', function() {
return current_user_can( 'administrator' );
} );

but where should I add this line?

in functions.php? or you index.php file?

[Nashwan Doaqan]

Check this post..
https://wordpress.org/support/topic/need-better-instructions

I will make it more easier in the next update.. Thank you :)