Translating single tour tabs with Loco not working

Hi,
I am trying to translate tabs inside a single tour.
I found this solution http://support.physcode.com/forums/search/translate+tour+tabs/, but not working for me.
I can add new tabs using your plugin (no problem)
I can hide tabs using filter in functions.php (no problem)
I can’t translate tabs names. Translation is done in Loco, but
not working on frontend. Other plugins or theme parts are translated
without any problems.

Please help