it explains how to reinstall OE only and it does require some registry work. You can handle it just navigate to the key explained in the articles. Go to Start\run and type in Regedit and hit enter. When the editor opens in the left pane you will see the major keys with plus signs in front. Click the plus signs as shown below.
After you click the last plus sign on the CLSID above, (long string of numbers) make sure the CLSID is an exact match. Look in the right pane for the DWord “IsInstalled” Right click the “IsInstalled” DWord in right pane and select Modify. Change the value from 1 to 0 <—–Zero. Click the Registry tab up top and select exit. Now follow the rest of the directions Number 5.