Step 1: In Lightroom, select Edit > Preferences (or simply click CTRL+COMMA)

Step 2: In the pop-up screen, select the Presets tab

Step 3: Click the "Show Lightroom Presets Folder" button

Step 4: Double click on the Lightroom folder

Step 5: Next, double click on Develop Presets folder

Step 6: Copy the (unzipped) Bellevue Avenue Presets folder that you purchased into the Develop Presets folder

Step 7: Close & restart Lightroom

Step 8: Your newly installed presets are now ready to be used!