How I fixed my ATI 2010 incremental backups on Win7 x64
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After a lot of frustration, I figured out what was causing my incremental backups to fail... they were creating another full backup instead of an incremental and failed after several hours and finally running out of disc space.
The default name that ATI 2010 assigns a new backup includes the @date@ value in the name. I found that if you name it something that does not include the @date@ value when creating a new incremental backup, then backups subsequent to the initial full backup will indeed be incrementals as they are supposed to be. I just named mine "Full Backup" (without quotes).
My first incremental (after the initial full backup) only took about 15 minutes.