Windowblinds shareware vista general qs

Hello,

I have just downloaded the shareware version of Windowblinds (30 day trial)

I have a couple of questions:

(i) I can only apply a couple of themes, with others nothing happens.  Is this a restriction on the shareware?
(ii) When I run the cursor over the sidebar e.g. Change visual sytle, Edit in skin studio, the text of these options disappears.  It reappears when I move the cursor away.  Why does it do that?

I am running Vista Ultimate.

The other details are

Your computer has a Windows Experience Index base score of 2.4
Your Windows Graphics Experience score is 2.4

WindowBlinds version : WindowBlinds 6.1 (build 97 x86 - Vista Edition) - Shareware

WindowBlinds is installed correctly on this PC
(Generic PnP Monitor) 1 is attached to NVIDIA GeForce 6100 nForce 405 (Microsoft Corporation - WDDM)

Wblind.dll         2008/05/06 11:05:17
Wbsrv.dll         2008/04/29 21:58:36
Wbconfig.exe         2008/04/29 22:01:57
Wbload.exe         2008/04/26 16:14:14
Wbhelp.dll         2008/04/26 16:14:07
Tray.dll              2008/04/26 16:14:21
Wbload.dll              2008/04/26 16:14:28
Screen.exe         2008/04/26 16:14:05


I am interested in purchasing the software but need to especially that I can apply other skins.

Thanks