While working in the PCB Editor, the command execution sometimes seems to freeze and I am unable to select Done from the right mouse pop-up menu which is necessary to complete execution of the command. 

I also receive a warning that says, “Finish current command before starting a new command” in the command window.


In the command line, located in the lower right part of the screen as shown below, type the word “Done” and then press your keyboard enter key. This should free up the working window.