The 0115 stands for January 2015. The start of the 2015 production year. So if you have a motor that was made in any month of 2015, that would be the parts catalog to use.
Another thing you can do is to put the engine ID into the search box at the top of the page. Press the enter button. It will take you to the catalog for that specific engine ID.
Keep in mind that some part numbers change over time. A 2015 production year VF250LA used -00-00 parts. They have been upgraded to the -01-00 configuration. Order the -00-00 but you will get the -01-00.