Credit Card Expiry Till 2015?

My site (https://sukkahoutlet.com) seems to be working great but on checkout the credit card expiration field only goes to 2015, how do I update that?

I am using latest WP version 3.5.2 and Shopperpress vs. 6.7 which states on update page (on site) that it is up to date. According to this site it states that latest vs. is ShopperPress 7.1.4.

1) Do I need to update to correct problem and if so I can’t find info on how to without messing up current data on site .

2) Any suggestions on correcting issue, I have disabled all plugins one at a time already.

Thank you,
Abi