I use IntelliJ IDEA 15 and have a problem with the auto-saving. For example I make a new configuration, e.g. Show the line number. When I close IntelliJ and reopen my IDE, it doesn't save my configuration and shows me this message:
Unable to save settings : Failed to save settings . Please restart IntelliJ IDEA
.IntelliJIdeaXX\system
and restarting. It seems like something is corrupted. – dambros