If you're having trouble with your version of ListMessenger you have a few different options.
ListMessenger Pro users have priority support on the forums (tier 1) and also have an escalated e-mail support option (tier 2) if the problem cannot be solved on the forum. ListMessenger Light users are not left behind if they have a problem; however, they are limited to our public forum support.
ListMessenger 2.1 has just been released (Pro & Light)! This release adds several new features and resolves all known bugs, making this our most stable release to date. To read the full release announcement, please visit the public forums.