Corona Image Editor (CIE) is standalone image... well, editor, basically standalone VFB. It is bundled with Corona 1.6 and should be installed by default. You can locate it at C:\Program Files\Corona
I was saving as .jpg but I noticed that if I save images as .tif the render shown as more sharpen. However if I save as .jpg it looks like soft and distinct from which I see from VFB channel. How should I save my render output format?
3ds max default jpeg compression settings are pretty bad. You may want to set smoothing to 0 and quality somwhere between 90 - 100. It's one time operation, as next time max will remember your last used settings.
As for your original question, it's likely that your output gamma is set to 1.0 (typical for Vray users) and that forces you to override gamma everytime you save to non linear format. Since 3ds max 2014, there's no convenient way to set input/output gamma, but you can try to enter
FileOutGamma = 2.2 in maxscript listener window and see if that helps with your problem.