Explorer background

My Explorer background (right pane) is different, depending on the way I move to a folder.

To show what I mean I have added two partions under Libraries and used the Top Hat skin.

If I start in Libraries (left pane, folder tree), I can select Disks and then Backup (G:) and I will get the grey background defined by the skin as shown in first attached picture. I can then even select subfolders and the background remains the same colour.

If, however, I select Computer and then Backup (G:) in the left pane (folder tree) I get a white background as shown in the second picture.

With some other skins, like Cimmerian, I get the same results. Again with some others, I also get a white background but then the text also becomes

transparent.

I tried several things, like reinstall (and cleaning the registry before installing), reinstall after disabling EMET and my anti-virus, etc. but the result remains the same.

Could someone tell me how to always get the same grey (skin) colour?

My OS is Windows 7 - 64 bit.

Your computer has a Windows Experience Index base score of 6.4
Your Windows Graphics Experience score is 6.4

WindowBlinds version : WindowBlinds 7.42 (325 - Windows 7 Edition) - 64 bit OS

WindowBlinds is installed correctly on this
PC WindowBlinds appears to be activated on this PC
(LG IPS231(Digital)) 1 is attached to Intel(R) HD Graphics 3000

Wblind.dll         2012/07/13 13:23:20
Wblind64.dll      2012/07/13 13:24:18
Wbsrv.dll          2011/09/26 15:10:56
SevenConfig.exe      2012/07/09 17:44:31
Wbload.exe      2010/10/20 16:08:35
Wbhelp.dll        2011/10/04 10:01:37
Tray.dll            2009/10/23 20:12:19
Wbload.dll        2010/06/07 15:59:25
Screen.exe      2010/06/07 15:59:43