Run the *.zxp file and follow the instructions. This only works with Adobe Extension Manager CS6 or newer.
If you cannot use the *.zxp file, go to Window > Actions. Click on the panel menu (top-right corner of the panel) then click Load Actions. Browse for the "HDR Pro by SparkleStock.atn" file then click Load.
Using the Photoshop Actions:
Go to your Actions panel (Window > Actions), open the panel menu located on the top-right of your panel, then choose "HDR Pro by SparkleStock".
In your Actions panel (Window > Actions), select the "Step 1 - Load HDR Images" action then click the play button. Load all the exposures that you'd like to include in your tone mapping. If you only have one exposure, load just the one image.
Select the Step 2 action that corrosponds with the number of exposures you have with your image. For example, if you have one image, select the "1 Exposure - Render All DRI Effects" action. If you have 3 exposures, select the "Step 2 - 3 Exposures - Render All HDR Tone Mapping Effects". Click the play button then select the effect in your History panel (Window > History)
There are 3 actions below the "Step 3" action. Play any of those actions to further enhance your HDR/DRI image.
Boost Shadows - Reveal details in the dark areas of your photo.
Restore Highlights - Reveal details in the bright areas of your photo.
Midtone Contrast - Restores contrast in the midtones of your image.
This step is optional. Select the "Step 3 - Render All HDR Looks" action then click the play button. The effects will appear as snapshots in your History panel (Window > History). Select the effect that you'd like to use.
Note that the video below is shown with the premium version of this action. You can get it by joining SparkleStock