@MrG
RC2 "feels" better (subjectively speaking). The added buttons on the File List tab are a notable improvement - now its clear what one is doing with respect to files. I like the Defrag Folder and Defrag File options. From a performance perspective, I would really like to see options for moving all folders to the front of the drive (ala JKDefrag et al) and for respecting "layout.ini"....
The opening screen "Defrag" button still leaves one wondering in what context the "Defrag" would be conducted. Perhaps adding additional button text such as - "Defrag Drive" or "Defrag Partition" (or "Defrag X:" i.e. the currently selected partition) - would help define in what context one is about to conduct a defrag (similar to your "Defrag Checked" button text). In fact it would be convenient to have buttons for both....(?)
The overall interface still seems a jusssst a bit too busy (not to be critical....just a sense or an initial impression when opening the program). My "sense" is that the menu bar, drive list, drive map, drive tab, file tab, and buttons "seem" to (almost) create a bit of visual confusion...but, then again, I am not exactly sure what I would change either...and I've even suggested some additional items...

(at self)
It might be quite "spiffy" to replace both the drive Properties and drive map with a circular drive map ala UltimateDefrag (~say placed in your "Properties" box???).....that would give one a real feel for where files are being placed on the drive platter. In fact, if the partition structure on the drive platter was highlighted that would be an even better representation than anybody (?) else offers to date.
And, THANKS, for removing the "Are you sure" dialogs....
galileo