GOT IT!
Find at line 685 in vS_HHR_Engine.php:
PHP Code:
if (!($purpose == 'dopost' AND $show['toolbar_showtogroups_button']))
{
$message = preg_replace("/\[(" . $this->tags['SHOWTOGROUPS'] . ")=("|\"|'|)([0-9,]+)\\2\](.*)\[\/\\1\]/siU", $replacement, $message);
}
Replace with:
PHP Code:
if (!($purpose == 'dopost' AND $show['toolbar_showtogroups_button']))
{
// hack trying to fix HIDE without options
$message = preg_replace("/\[(" . $this->tags['SHOWTOGROUPS'] . ")\](.*)\[\/\\1\]/siU", $replacement, $message);
$message = preg_replace("/\[(" . $this->tags['SHOWTOGROUPS'] . ")=("|\"|'|)([0-9,]+)\\2\](.*)\[\/\\1\]/siU", $replacement, $message);
}
The regex was not going to match on to the tag without the options included. I basically duplicated the function of the HIDE-POSTS match above it at line 662. Works great now.
Now to figure out the toolbar button prompt issue. The provided instructions are incorrect and lead to a dead-end.