Add to: admin_templates.xml
Add to: UserUpgrade.php
( Remember of run install again to change xD )

<xenption value="brl">BRL</xen
ption>
Add to: UserUpgrade.php
'allowedValues' => array('usd', 'cad', 'aud', 'gbp', 'eur', 'brl' )
( Remember of run install again to change xD )
