suddenly stopped ide arduino

please help me >
suddenly me ide stopped
and did not open i don't know the reason

Not behind a pc at the moment

There is a debug version of the IDE in the same directory as the normal version. I suggest that you run that and report the errors that you get.

Somebody might be able to help further after that.

Btw, which IDE version,? Which OS?

The filename is arduino_debug.exe. It might only be part of the Windows version of the Arduino IDE. On non-Windows versions I believe you can just run the standard Arduino IDE executable. You will need to run it from the command line, otherwise you won't have enough time to view the output.