(!) We would not recommend using manual code addition.

Desktop:

The theme is built in a way that makes the layout look broken on desktop. Would not recommend it.
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Mobile:

Use this code:

<div class="ultimate-currency" style="display:inline-block;padding-top:7px;margin-right:-15px"></div>

Place it inside the header.liquid file in line 99:

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Click "Save".

Test it in your store.