A useful feature?
 

A download priority a la Getright. The ability to say one download should be completed before using bandwidth on another one. Saves messing about with pauses (Which would also stop me from inadvertantly deleting half my queue by accident when I try to stop one file)

Just noticed something else.

In a Windows window, select any number of files. Now right-click a single file that you did not select and click delete.

Result - One file is deleted.

In XOLOX, select any number of files. Now right-click a single file that you did not select and click Cancel download.

Result - Voila! all the files you previously selected are deleted!

I just paused a bunch of files, decided to delete one other file, and now I've got to find them all over again :-(

Right clicking in Windows explorer windows deselects and then reselects, Xolox uses a different method of selection. Right clicking does not deselect only left clicking.