[arch-general] How do I preserve changes to okular.desktop?

Hi, every time I upgrade okular chrome starts opening two instances. One has a dialong saying it couldn't find '%I' and the other has the document I want. All I have to do to fix it is to remove %I from the .desktop file. How do I preserve this change across upgrades? Alternatively, how do I get the '%I' to be expanded properly? Sorry if this is asked a lot. My search-fu was not up to the task.