First, thanks for upgrading the widget so quickly.
Just upgraded to 1.5 and noticed a minor issue with the widget image extension display. The image path points to wp-content/plugins/wp-downloadmanager/images/ instead of wp-content/plugins/wp-downloadmanager/images/ext.
http://wordpress.org/extend/plugins/wp-downloadmanager/
Yeap, Restoring the template to the default will solve the problem.
Um - even though there's no template for the widget?
There is, it is called "Download Stats Templates"
My profound apologies! That'll teach me to look properly first.