If it would be ok to make a feature request for the next version...
Actually, I am surprised Image Burn does not support multisession burning. Image Burn has some great features.
For backing up data, multisessioning is a godsend.
One of the main purposes of using burning software (for me and most likely a lot of other people) is the ability to back up data incrementally to a single DVD.
There is not a lot of point backing up data to numerous DVDs.
By the time you build up an appreciable amount of data to back up, you risk losing that data during the buildup period.
Of course data could be backed up to a flash drive in the meantime. Most people however would however like to use a more permanent form of backup eventually.
What I normally do is use a flash drive and a multisession dvd
Though flash drives are great I have had a couple fail on me and I lost a lot of data.
Hence the need for a multi session dvd.