The first step to checking expired items is to make sure that they Expired Items box in the upper left hand corner is checked.

Once you have that selected, you can pick your first item in the program.  To do that, just click on the item in Date Check Pro once you have found it on the shelf.  Date Check Pro will let you know which date you are looking for on the shelf.

Once you have searched the shelf and checked the date of every item, you can answer yes or no for whether or not the item is there.  If you answer no, the program will skip to the add the next date screen that you see in a couple screenshots.  If you answer yes, the program will ask for how many items you found, which is what you see directly below.

After you type a number and hit the submit button, you will see the following screen.

Once you hit the finished button, you will see the screen to add the next closest date.  If you hit no earlier to the date being there, you will be progressed directly to this screen.

If there are no products left on the shelf, you should select the Out of Stock option shown below.

If the item is not on the shelf and is no longer going to be sold at the store (usually indicated on the shelf tag or by there no longer being a shelf tag), you should hit the discontinued button.

Once you have hit submit, the program will take you back to the view of all items that need to be checked.