APlay Pro Supports Decklinks and other Blackmagic Devices. See below steps to easily setup your Blackmagic device with APlay Pro.

1. Open APlay Pro
2. Go to the settings cog in the upper right corner
3. Select Outputs in the left Menu
4. Click "Enable Blackmagic" near the middle of the screen
5. Select your Blackmagic device from the dropdown menu
6. Pick your frame rate and resolution (verify from what you already use in ProPresenter)

NOTE: Blackmagic devices competing for the same input will cause APlay Pro to crash.

If APlay Pro crashes when you try to setup a second Blackmagic device:

1. Enable your second output without enabling Blackmagic
2. Then disable your first Blackmagic output from the top Outputs menu
3. Then enable Blackmagic (from the Blackmagic Design menu) on your second output and select your desired device from the Blackmagic dropdown menu
4. Afterward re-enable your first output and both should not be competing for the same output and run smoothly.