Several readers expressed confusion with our coverage (see "PlusOptimizer Defragments HFS Plus Volumes") of Alsoft’s new disk optimization program PlusOptimizer, which costs $29.95 and implements only some of the features of DiskExpress Pro. Although no statements have been published on the company’s Web site, Alsoft has said to several readers that they will provide the Mac OS 8.1 and HFS Plus-compatible upgrade to DiskExpress Pro for free to existing customers. In the meantime, though, some DiskExpress Pro users have felt that they have no choice but to buy PlusOptimizer as an interim solution until the DiskExpress Pro upgrade ships. The other option, of course, is not to worry about disk fragmentation issues; the concern often outweighs the reality of the performance problems related to fragmentation. A simple backup and restore also eliminates all fragmentation, and you do have good backups, don’t you?