Hi, thanks for your replies RealTime and blckjck. It had v1.07 installed when new. I recently downloaded the v1.10 update but have had no joy running it from the Tascam CDR. I just burned the file onto a disk on my Mac as there were no instructions for any particular way to prepare it, and then followed the update instructions to no avail. After reading up some of the threads on here, I'm thinking perhaps I'll need to buy the Eprom RealTime found?