I just installed GS on my laptop running Windows 8.1 Pro. I right-clicked the tray icon and selected Capture Window. When I moved the target cursor to one of my Explorer windows, I was only able to target one of three regions but not the entire window. If I targeted the title bar, unlike Windows 7, it only highlighted the title bar plus menu bar. Moving downward it then highlighted the menu bar + nav bar (back/forward arrow, file location, search, etc.). Moving downward again highlighted the "content" area where the files are displayed.
I guess I would expect it to behave as in Windows 7, i.e., when targeting the title bar, it should highlight the entire window. Using Alt + Prt Scn works but the title bar is all black.
System Info:
Greenshot 1.1.7 Build 17 (64 bit) downloaded from sourceforge
HP EliteBook 8540p
OS: Microsoft Windows 8.1 Pro 64 bit, Version 6.3.9600 Build 9600
Graphics: NVIDIA NVS 5100M, 1.00 GB
Please let me know if you need any other info. Thank you.