Deleted Office 2007 after installing Office 2010

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?
 
Right-click on one of the files, OPEN WITH and select your Office/2010
 
I still get the error "There was a problem sending the command to the program" Why is this? I only get this error message when I try opening excel, it will open word docutments
 
Office 2010
  1. To begin, click on Start and then Control Panel.
  2. After the Control Panel window opens, click on Uninstall a Program.
  3. A list of all installed programs should now appear. ...
  4. After the dialog box loads, choose the Repair option and click Continue.
 
Back