Everytime I launch the Arduino IDE whether it is an existing sketch or a new one it is always greyed out as soon as it is opened. I could not create a new sketch or edit the existing sketch. Any key that I strike would not register in the IDE. Looks like it freezes. However, I can upload the existing sketch and seems to work properly. Any help or suggestions on this matter is greatly appreciated. Also, I tried to uninstall and reinstalled the latest version software several times (also did the same thing to the older versions) but did not succeeded in fixing the problem. Thank you in advance.