custom code in a plugin i use

im using a plugin call amelia - its a plugin for booking mange. when the client go throw the booking procces at the and it use the function of woocommerce "add to cart" and send him to woocommerce for payment. in woocommerce settings there is a check box to choose if you want to redirect customer to cart\checkout page after he "add to cart" a product. in my settings is unchecked so in the woocommerce shop page when user add a product it will not redirect him. with the amelia plugin its redirect to check out cuz thats how is the code in amelia plugin. i need some one who can change the code in the plugin so it will not redirect to check out after client "add to cart" his booking from the plugin