Thank you so much for this wonderful program!
There are some things that keep me from completely switch from Free Commander, like:
-quick launchpad button for external programs (some sort of quick launch)
-red color for delete icon
-shortcuts for quick view and quick edit configurable for external programs
-copy and move shortcuts from active to inactive panel (horizontal or vertical)
-support for browsing archives (zip, rar, 7zip)
-another method for send to tray (the current one does not work correctly - does not free the memory like minimize to taskbar does)
-option to not auto-expand the tree when browsing inside the panel
-button for quick compare folders
-button for fast switching between panels
-make new file button
-button for viewing the folders sizes
-quick search in current folder
I think you are going the right way with Q-Dir but there is always room for improvements.