I've run into the same issue in the past. The name of the "Files" folder is stored inside the JOB file. Simply changing the JOB filename has no effect.
The workaround for me is to convert it to a JXL and do a find and replace with a text editor. Then you can optionally convert it back to a JOB file.
I suppose you could make a copy with the correct name on a controller or the emulator, but I haven't tried that.