ooops.... now you see him, now you don't,,,,
For what it's worth and in case you applied it directly on the original image or duplicate.... it's better to apply the filter on black or 50% gray filled layer (choice depending on the lightness or darkness of the image), play with the layer modes and lower the opacity. In this way you have an extra control of the intensity.
In my example, I've set the flare layer mode to Screen with lowered opacity. I also added a white layer to soften the image. Don't mind the guidelines.... they're added in just to give me a sense of where to position the flare on the base image ......
Try applying the above mentioned procedures before proceeding to color adjustments on the base image.....