welroosmedia on "[Plugin: WooCommerce - excelling eCommerce] Edit customer emails"

Hi,
I have edit the customer email text in a .po file which is located in /wp-content/plugins/woocommerce/languages
Unfortunately I've changed some text for the second time and now the displayed text in the customer emails won't change. How can I solve this?

http://wordpress.org/extend/plugins/woocommerce/