Adobe Digital Editions 4.5 Blank screen

So yesterday I loaded my adobe up and I just get a blank screen.. It does not show anything. My library books don't load nothing loads. I have uninstalled and reinstalled. I have done nothing different. IT work Friday when I returned some of my library books but when loaded Sun was unable to download new books. I am new to this Forums but really want the program to work. IS there anybody on here who can help me out... I am stressed and alot going on in my life and my ebooks take me away for all.. Thanks.