So last week I installed Office 2010 on my computer and uninstalled Office 2007. At first I thought everything was good to go. But when I go to open up an Excel file I cant unless I open excel 2010>File>open>and then find the file I want to open. Is this because they aren't compatible? If I just go into my computer and try to open the file it tells me "There was a problem sending the command to the program" I can open Word Documents just fine either way I go about it. Its just Excel I'm having issues with. Any solutions?