Fix open button shows save dialog.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Make method of operation better.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Extract constants.

Signed-off-by: yushijinhun <yushijinhun@gmail.com>
Fix ArrayIndexOutOfBoundsException.
cleanup
Exit after crash.
Update version number
Merge branch 'pre-release-0.3' into develop