Editing Refdes of Library Builder Part

Hi everyone,

I created a header using the Library Builder, which got assigned a reference designator U?.  I went into the Edit Symbols Properties and updated the Part Reference to J? and exported the symbol and footprint to my library.  Here's a screenshot:

When I go to place that part in the design, it is still using the U designator instead of J.  Is there another location where I need to update the refdes in Library Builder?

Thanks!

Matt