I have been a long time user of Total Commander software and the one setting that I am used to is the ability for the right click button to be able select and deselect files. A long hold of the right click button (2-4seconds) brings up the right click menu for the selection. I noticed you have the ability to turn off the NC selection mode and enable explorer type selection. What I find the NC selection mode lacks, is the ability to use the keyboard and shift+page up and down to deselect files. It works for selecting files, but then I find that the deselection of files has to be done individually with the space bar. Adding the deselect with shift+page up and down and shift+home and end, as well as the ability to deselect files by using the right click button would be a great addition to already great software.