I am new to the whole Macrium process but have managed to run the software and now have 4 backups. Knowing how dumb this question is, I am going to ask anyway - I can go ahead and manually delete the first one, correct? No need to keep 4 - 3 should do it. Also, Macrium did an update today. Do I need to create a new bootable dvd to incorporate this update? Thanks very much in advance.