Component Editor does not update (Solution) - Incorrect display 

Question:
When I double click on a component in One-line, it does not update the component editor to show this device. Even with "Go to component editor" does not work.
It works fine on other computers. Why?

Solution:
First, check if user have read/write access on the location where the project is located.
Second, double click on a component, go to Window and see if Component Editor is listed... If it is listed, click on Cascade

This command bring all the windows to the top (Including the one off screen).