1. Download the ZIP file that begins with [XMP]. Do not extract it.
2. Open Lightroom and go to File → Import Profiles & Presets... at the top of the screen.
3. Navigate to the ZIP file you have downloaded in step 1 and click Import.
4. Done.
   

To use the presets:

1. Open a photo you'd like to edit and click on the presets menu on the right edge of the screen, (icon of two overlapping circles).
2. In the Yours tab, you'll find all your presets. Hover over them to preview. Click to apply.
3. After applying, an Amount slider will appear. Here you can adjust the intensity of the preset.