First off, make sure you have downloaded and installed INSTRUMENT, and linked your Spitfire and Splice accounts.
Once that is done, you will find your owned Spitfire Audio products in INSTRUMENT when you log in.
You can navigate to your owned packs by clicking on 'Your Library' on the left hand side, selecting Packs and clicking on the owned tag to filter them.
You also have the option to search by product name from the pane on the left hand side, or from the search bar within 'Your Library'
Owned packs will also display a green lock icon.
Click on the pack and you'll be taken to its page, where you'll see the option to 'Download All', or you can choose to download individual Presets below by clicking on the download icon
When you start a download you'll see the progress for the pack and given presets on this page
Once a preset is downloaded it will show a blue tick, and a load button
Clicking on the button will load the interface, where you can play the preset
