Woo Coupon Box string do not translate

Hi there,
I bought your excellent plugin last week, but it gives me some trouble.
Most importantly, the strings that I entered in the Customizer fields and then fed to WPML do not translate.
Some like the placeholder texts in the form fields do, but the main strings for headers, footer and bodytext do not…
Further, when setting the popup up in the customizer, I had to enter everthing 4 times, before the stuck!
Hope you can help!
Thanks, bye, ward