Amonst orum rules is: one question per thread. But since this looks like a brief thread and since the question is solved I wanted to ask this.
The downside of fullrow selection is that you can't draw a selection-box around files. If you click and hold it will drag the file/folder..Is there a way to avoid this?
Use Power Mode instead of Details mode. By default in Power Mode you can drag up & down to select/deselect things and you can drag left & right to initiate drag & drop.
You can also use Details mode with the "Full-row selection: Display only" option turned on, in which case it behaves like normal details mode except that selected items are highlighted across their entire row (but the mouse works the same as it does normally).
Note to anyone else reading this thread: We're now talking about the file display rather than the folder tree. You can't drag-select or multi-select in the folder tree, obviously.
Sorry, I was referring to the original question (before the topic hijack ).
Double-clicking folders expands/collapses them (I don't know why you state it has no effect?), but only when you actually click on its name, even when 'Full-row selection' is turned on.