Change default "export as wav" chain-setting

Hi. Couldn’t find mention of this elsewhere so asking here. Does anyone know how to change the ‘save’ defaults when using chains in the ‘Apply to files’ mode? Finishing with a ‘exportWAV’ instruction ends up with filenames that are timestamps, which doesn’t help. Can this default behaviour be changed so it simply saves using the same filename as the file that the chain was being applied to?