Can't locate textdomain for string

Hi,

I just installed this plugin and am running into a problem. I can’t find the textdomain for the string I want to change. Please find a screenshot below from inspect element of the string.

‘Verzenden naar ander adres?’ is the Dutch translation of ‘Ship to different address’.
I want to change the Dutch text to ‘Kies onderstaand het bezorgadres’

I’m not very technical, so maybe i’m missing something. Hope someone can help us out.

https://drive.google.com/file/d/0B94LsXOhv8fUTzJMTHktQ0ZDU1E/view?usp=sharing

https://ww.wp.xz.cn/plugins/say-what/