Download Construct 2 release 45
http://www.scirra.com/construct2/releases/construct2-r45-setup.exe

＞- [Feature] Picture editor
＞- [Add] 'Always save' option for the image editor in Preferences.
＞- [Change] Sprite: hot spot now defaults to centered, but rounded to the nearest whole pixel in its texture.
＞　This should correct some pixel-perfectness issues.