In 1.4, the instance class file is upgraded when the main Listit2 is upgraded.

My instance class is something like:

class ListIt2MobileList extends ListIt2 {
....
}

For instance, I needed to add some routes to an instance for custom custom URL
redirects.  I added the action.redirect.php in the new instance directory, added
a new GetVersion() function to indicate this was a different version, and added
something like this to this instance class:

	public function InitializeFrontend() {
.....
		// Custom
$this->RegisterRoute('/' . $this->prefix .
'\/redirect\/(?P<returnid>[0-9]+)\/(?P<item>[0-9]+?)\/(?P<returnpage>.+?)$/',
array('action' => 'redirect'));
....
        }

ListIt2 is prone to upgrade this file regularly and overwrite my changes.

Is there an easier way to avoid this?  I ended up deleting the Instance
reference in the listit2_instances DB table, and am managing this new instance
as a generic module.

TIA
Mike