I am trying to edit webosdoctor.jar file in windows 7. I am using 7-Zip to open .jar file and navigate to the file I need to modify. Once I make change, I can't seem to save the change as it gives error in 7-zip. If anyone can point me to utility which would allow me to edit files inside jar file and properly put it back into jar file, I would really appreciate it. Sorry that this question is so basic, but I couldn't find a clear answer to it, so my apologies if this has been answered in the past.