Do I need to uninstall 1.2.4

Do I need to uninstall 1.2.4 before installing 2.3.3? Will I be able to apply legacy behaviors or continue to work with legacy behaviors on existing sites I may not want to upgrade?

You should not need to uninstall first, and you should be able to keep using old mysql server behaviors you don't want to update.

Thanks.

BTW, I just noticed that this code:
<?php
// Create Subject Array
while (!$subjects->atEnd()) {
$subjArr[$subjects->getColumnVal("id")] = $subjects->getColumnVal("subject");
$subjects->moveNext();
}
$subjects->moveFirst();
?>

Gets tagged as an"eCart Repeat Cart Region (Subject)", but there is no cart on this site.

That seems to be a small common bit of code to get tagged as a behavior like that. Change it to:

<?php
// Create Subject Array
while (!$subjects->atEnd()) {
$subjArr[$subjects->getColumnVal("id")] = $subjects->getColumnVal("subject");
$subjects->moveNext();
}
// Reset RS
$subjects->moveFirst();
?>

and it is no longer tagged a behavior.

The eCart and recordset now have similar methods, so it is confusing the two. Since this is hand coded, it isn't able to differentiate the two.