qTranslate remove default directory from link

/ru – default directory, how can I remove it

this link: https://cambridge.ua/ru/teachers/
should be: https://cambridge.ua/teachers/

<ul class="language-chooser language-chooser-text 
qtranxs_language_chooser" id="qtranslate-chooser">
    <li class="lang-ru active"><a href="https://cambridge.ua/ru/teachers/" 
hreflang="ru" title="RU (ru)" class="qtranxs_text qtranxs_text_ru">
<span>RU</span></a></li>
    <li class="lang-en"><a href="https://cambridge.ua/en/teachers/" 
hreflang="en" title="EN (en)" class="qtranxs_text qtranxs_text_en">
<span>EN</span></a></li>
    <li class="lang-uk"><a href="https://cambridge.ua/uk/teachers/" 
hreflang="uk" title="UK (uk)" class="qtranxs_text qtranxs_text_uk">
<span>UK</span></a></li>
</ul>
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