Translate WooCommerce Boost Sales plugin with loco translate

Dear,

I adore your plugin. But I need translations because of my dutch site. I red in the comments it could be possible with loco translate. When I translate something in the loco translate plugin (of course inside Boost Sales plugin section) the changed are not made. If I try to change other plugin translations (woocommerce for example) the changes are made. What to do to make sure I can get the plugin translated?

Hope to hear from you,

Thomas
smarthomebeveiliging.nl