Since A while (last update to 2.5.0.2 [Unicode] x64 2014-04-23 ?) I have this problem:
In a file list I click on an item => it is selected and has focus
I disregard this selection and click on another item
This gets selected in addition to the first one and now has focus.
Double clicking on this second item opens both the second and the first item.
To unselect the first item i need to click it again.
I have tested in other programs, even Windows Explorer: a click selects only the current item
CTRL-click and SHIFT-click still act as intended
At first I thought this to be a quirk of my Intuous tablet (which in other cased does not exactly behave as a mouse, e.g. in Acrobat). But also after switching to a real mouse I have the same problem in X2. I have not found an option (even in advanced) to get the intended bhaviour.
What can I do to get the correct (ntened) behaviour of the single click back?
Well, after re-applying D:\System_ddd\saves\Xplorer2\x2settings.reg (where I from time to time save the settings) everything ist OK again!
It really seems that ALT+S was the culprit, because i have an AHK script running which closes Windows 'gracefully' (logging some data). This is invocked by ALT+CTRL+S and then ALT+S selects the action Shut Down. Most likely using these short cuts careless may have caused to be executed during Xplorer...
Thank You frizzleFry for this hint!