[Plugin: WordPress Download Manager] Different icons for different files

I am trying to assign icons for different file types – like PDF, DOC, XLS, etc, but whatever I do, chosen icon is attached to all files on download page (it is science institute and guys are exchanging documents on that page).
Is there any way to do that, or only one icon covers every filetype?

http://ww.wp.xz.cn/extend/plugins/download-manager/