In ManagePaid.controller.php
'dummy_currency' => array('select', 'paid_currency', array('usd' => $txt['usd'], 'eur' => $txt['eur'], 'gbp' => $txt['gbp'], 'other' => $txt['other']), 'javascript' => 'onchange="toggleOther();"'),
'dummy_currency' => array('select', 'paid_currency', array('usd' => $txt['usd'], 'eur' => $txt['eur'], 'gbp' => $txt['gbp'], 'other' => $txt['other']), 'javascript' => 'onchange="toggleCurrencyOther();"'),
toggleOther() is now toggleCurrencyOther() which is a lot more descriptive, just the call was not updated !