New
#21
Forget it. The Free version is perfectly acceptable for normal use. It is not permitted to use it in a commercial environment but works anyway but I do not encourage violation of agreement.
For domestic users, there is little need to buy the paid versions as most extra features are largely business orientated to network deployment, multiple pcs etc. I could go into a long explanation about incremental and differential backups but not here.
Suffice it to say they do similar, but diffs are less storage space efficient than incs (only in paid version). Diffs are more than good enough for average domestic user.