Set Classifieds to expire in one year

Hello,

I am switching from Another Wordpress Classifieds Plugin to wpmudev's Classifieds plugin. One of the troubles I'm running into is that I have a bunch of ads that I need to move over that are all paid up for a year. Is there a way to set the expiration date for these? I've tried setting them up and not choosing an expiration date, but after hitting "Publish" they will be visible initially, but when I check back a while later I find them unpublished again.