Note: The following solution works in Threads 7.1. There may be minor differences in later versions, but the concept should be the same.
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In the /scripts directory, open
newuser.inc.phpOn or around Line 636 look for this block of code:
// VISIBLE SELECTION
if (isset($regopt['USER_VISIBLE_ONLINE_STATUS'])) {
$thisoption = <<<EOF
<tr>
<td class="alt-1" width="50%">
{$ubbt_lang['ONLINE_HIDE']}
</td>
<td class="alt-1" width="50%">
<select name="USER_VISIBLE_ONLINE_STATUS">
<option value="yes" selected="selected">{$ubbt_lang['TEXT_YES']}</option>
<option value="no">{$ubbt_lang['TEXT_NO']}</option>
</select>
</td>
</tr>
EOF;
Move the "selected" statement. That is, change this:
<option value="yes" selected="selected">{$ubbt_lang['TEXT_YES']}</option>
<option value="no">{$ubbt_lang['TEXT_NO']}</option>
To this:
<option value="yes">{$ubbt_lang['TEXT_YES']}</option>
<option value="no" selected="selected">{$ubbt_lang['TEXT_NO']}</option>