Suggestion:

A preference to turn off the "Open" dialog when you open Xee directly (meaning not through opening a file).

I, for one, never use that dialog to open files; I open them through the Finder.

But also, there are certain instances where that dialog is completely pointless and only annoying.

For example, when you just want to open Xee to paste the clipboard.

Therefore, I believe that dialog should be made optional.