You can now install Lightroom presets straight from the plus sign under the Presets dialogue when you are in the Develop Module in Lightroom.

HOW TO INSTALL LIGHTROOM 4, 5, 6 & CC 2017 PRESETS FOR WINDOWS

1. Open Lightroom
2. Go to: Edit > Preferences > Presets
3. Click on the box titled: Show Lightroom Presets Folder
4. Double click on Lightroom
5. Double click on Develop Presets
6. Copy the folder(s) of your presets into the Develop Presets folder
7. Restart Lightroom

HOW TO INSTALL LIGHTROOM 4, 5, 6 & CC 2017 PRESETS FOR MAC

1. Open Lightroom
2. Go to: Lightroom (Dialogue) > Preferences > Presets
3. Click on the box titled: Show Lightroom Presets Folder
4. Double click on Lightroom
5. Double click on Develop Presets
6. Copy the folder(s) of your presets into Develop Presets folder
7. Restart Lightroom