I've been having a weird problem. Unreal X-editor doesn't always go down in a clean way if there's more than one file/tab open. The process is left running in the background even though the GUI disappears. It doesn't seem to be doing anything, so I won't even notice it unless I try to open X-editor again. Many of the files I need to open in tabs for viewing purposes are read-only since they are under version control (Visual Studio). It shouldn't be a problem, though, since I don't try to change anything.
OS Name Microsoft Windows 7 Professional
Version 6.1.7601 Service Pack 1 Build 7601
System Type x64-based PC
Processor Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, 3401 Mhz, 4 Core(s), 8 Logical Processor(s)