You are free to select skins for your Store Manager from the list of skins installed with Store Manager. Go to Settings -> Skins to find the list of default and funny themes for Store Manager application.
These themes help you to color the application. You can find few Skins available at the moment below:
a) Lilian skin:
b) eMagicone skin:
You can find some thematic skins, such as:
1) Pumpkin skin - dedicated to Halloween:
2) Xmas 2008 skin - dedicated to the Winter Holidays etc: