DeepBurner appeared to be a very good program and I was ready to buy the "pay" version until I started having the same problems that I've encountered with other DVD burning programs. At first everything worked fine. I could burn a multisession disk with no problems. Then, after burning 2 disks, it would let me add data, "Append the disk", only once. Now it will not let me burn a disk period. I'm trying to burn less than 2.5 Gb of data to an unused, "blank", 4.7 Gb disk. I hope that the people at astonsoft can resolve the problem before I decide to purchase the "pay" version. Otherwise I'll have to keep looking.