Ah I see.
That is odd, mine originally did not have that button either but after updating my language variables and re-opening the configuration page they appeared.
This is just a shot in the dark but in your store/Smarty-2.6.19/Smarty.class.php file do you have the following code set to true or false?
Code:
/**
* This tells Smarty whether to check for recompiling or not. Recompiling
* does not need to happen unless a template or config file is changed.
* Typically you enable this during development, and disable for
* production.
*
* @var boolean
*/
var $compile_check = false;
If you do got it set to false you could try setting it to true and see if that updates your configuration page.