Not so sure if this goes here or somewhere else.
FRD has an Internal DASH multiplexer/merger which is used for plugins such as youtube. The problem is that when each part (e.g. m4a and m4v) is completed you can quit the program BEFORE multiplexing has completed without any warning leaving you with an incompleted (mp4) file. If you try and quit program while you are downloading any file you are given a warning that you are downloading. Shouldn't the same/similar warning be given on quitting before multiplex has finished. So many times I've quit before multiplexing has finished leaving me with NO OPTION but to download again or multiplex manually.