Download this filter and unzip it into your plugin directory in a new folder called AAA.

The focus control will either blur or sharpen your image. Slide to the left to blur or to the right to sharpen.

Adjust brightness, contrast, highlights, midtones, shadows, saturation, and color balance all at once.

To increase contrast, you may want to increase highlights and/or decrease shadows. To reduce contrast, do just the opposite.
Of course, you may use the contrast slider instead, which affects highlight and shadow values equally.

The midtones slider will increase or decrease the brightness of the midtones with minimal effect on the darkest and lightest tones.
The brightness slider affects all tonal values equally.

Save and recall your favorite settings. The Reset button sets adjustment sliders to zero.