XF 1.5 Deleted Important File.. How do I regenerate?

[MineRoyale]

I deleted a really important file (thinking it would simply regenerate), and now my forums page isn't loading, giving the error "Fatal error: Class 'XenForo_Template_Helper_Core' not found in /home2/mineroyale/public_html/forum/library/XenForo/Dependencies/Public.php on line 91"

How am I able to regenerate or get a new file?

 

[AndyB]

Download the same version of XenForo you have installed on your forum from here:

https://xenforo.com/customers/

Extract the .zip file to a temporary folder on your PC and upload to your server the missing Core.php file to your server.