This feature is extremely important to me as I manually record my old music from Vinyl to an audio cds using a seperate HiFi audio cd recorder (but keep the session/cd open without finalizing so I can add/burn mp3s from my computer). I use both vinyl records and audio cds, & make my own compilations of music but mainly use cds now. I need to add mp3s which I have on my computer hardrive (ripped using win media player), to the non finalized audio cds I have created using my HiFi audio cd recorder. This will allow me to fill up the incomplete audio cds I have left open with mp3/audio converted files from my computer hardrive prior to finalizing the cd ready for standard audio cd playback.
I am not sure why it has all of a sudden just stopped working. This feature worked perfectly well before and would like to re-enable this, so that I am not waiting too long before I am able to finalize/fill a part compiled audio disc.