DislikedMT4 build 418 apparently has some major problems. That may be the reason for the crashing.
If you can reinstall and use an earlier version do so, otherwise I would think 419 will arrive very soon.Ignored
More detailed description can be viewed here:
http://pipburner.com/metatrader-buil...vious-version/
http://www.donnaforex.com/forum/index.php?topic=5545.15
Regards, Josef