This thread is resolved. Here is a description of the problem and solution.
I'm trying to translate the " Enter the amount due" string of the YITH WooCommerce Name Your Price plugin.
I've found the string in the Admin Texts section. But I couldn't move it to the String Translation section. So I've registered it in WPML -> Settings -> Custom XML Configuration (tab). In this section, I've added the following code.
<wpml-config> <admin-texts> <key name="ywcnp_button_loop_label"/> </admin-texts> </wpml-config>
And now the string is available for translation in the String Translation section.
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