Once you have installed Embrilliance Thumbnailer (ET) there are a couple of things you will need to do in order to see thumbnails.
1. Tell ET which embroidery formats are of interest to you.
This is done via the Control Panel. The Control Panel is activated by double clicking the ET shortcut on your Desktop.
Here you can select which embroidery formats you want to see thumbnails of. I choose all by clicking the Select All button. Then click 'OK'.
2. Tell Windows you want to see thumbnails.
With the Control panel open click the Help Button. On pages 3 and 4 are descriptions of how to activate thumbnails in Windows XP and how to turn on Icons in Widows 7 and Windows Vista.
You can view the PDFs on this topic from the http://Embrilliance.com/downloads page too!