Start up a game and the push together Alt + Tab till you see Borderless Gaming again with the application name being listed.

Select the application

After selecting your application that you would like to make borderless then hit the following button:




This will now make your game borderless

After you have made a game go borderless and are done with the game you can now exit Borderless Gaming software and the achievement will pop up :



There is no spoon
Make something vanish

After you have made your game or application go borderless then you can either Alt + Tab and add the application to favorites in Borderless Gaming

To add a game to your favorites just highlight the application and then push the following button:

If you disabled Steamworks Integration, you will need to re-enable it or else you won't get the achievement. From what I have seen, the Disable Steamworks option always disappears from Tools immediately after clicking that option or after clicking it and restarting the app.

I discovered how to re-enable Steamworks Integration on version 9.5.6.

1. In the Borderless Gaming app, go to Tools>Open Data Folder.
2. Delete all files in this folder location.
3. Close down Borderless Gaming completely (right-click its icon in the tray and choose exit if you have to) and uninstall it.
4. Reinstall Borderless Gaming.

Now, Steamworks Integration should be enabled by default when you run Borderless Gaming and the Disable Steamworks option should be shown under Tools.

Credit goes to PrinceMojo