I had a number of maillists setup in the python powered maillist program. Unfortunately, I cannot seem to access them through the new Cpanel maillist manager.

Has the mail list application changed?

Is there way to access that older maillist application? or how can I modify the previously created maillists?

Thanks.

Software was not changed. Mailman is installed.
If you can't reach your mailing list that were visible at your control panel, please go to http://support.hostony.com and submit a ticket with mroe detailed info.