Suppressed PHP Warnings (in Query Monitor)

Hi, we were using the Query Monitor plugin to try to pinpoint some plugin issues (not your plugin–unrelated issues!) and I noticed that your plugin generated several suppressed warnings.

include_once(includes/wjecf-pro-controller.php): failed to open stream: No such file or directory
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:32

include_once(): Failed opening 'includes/wjecf-pro-controller.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:32

include_once(includes/wjecf-pro-free-products.php): failed to open stream: No such file or directory
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:33

include_once(): Failed opening 'includes/wjecf-pro-free-products.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:33

include_once(includes/wjecf-pro-coupon-queueing.php): failed to open stream: No such file or directory
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:34

include_once(): Failed opening 'includes/wjecf-pro-coupon-queueing.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:34

include_once(includes/wjecf-pro-product-filter.php): failed to open stream: No such file or directory
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:35

include_once(): Failed opening 'includes/wjecf-pro-product-filter.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:35

include_once(includes/wjecf-pro-api.php): failed to open stream: No such file or directory
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:36

include_once(): Failed opening 'includes/wjecf-pro-api.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php')
	wp-content/plugins/woocommerce-auto-added-coupons/woocommerce-jos-autocoupon.php:36

Seems like all the warnings are related to this plugin not being the PRO version–maybe calling these PRO-only files should be taken out of the free version so the plugin isn’t constantly searching for them?