here are some of my suggestions
1. when you want to rename a file after pressing F2, the filename is highlighted but:
when I press the right arrow, the cursor goes after the dot, while I would prefer to stay at the end of the filename but before the dot (and the extension of course)
and when I press the left arrow, the cursor goes one letter before the end of the file name, while I would prefer to go to the beginning of the filename
It used to be like this sometime ago and it was changed again after an update but I am not sure when..
2. I would like the several column sets to be saved and used independently for every folder. for e.g. different column set for music or picture folders.
3. the "play music in folder" button is useless if you don't have an m3u list of the songs and I really don't use such lists. I think it would be better to play all (or selected) mp3s with the default app. (after all if you use m3u lists it is easier to highlight it and press enter:-)