Hi there! It sounds like you’re trying to use the LDS Family History app with an append disc and want to know how to start playing it. I want to make sure I understand correctly: Are you working with a physical disc that you insert into your computer’s drive, and then you want the app to play or read content from that disc?

If that's correct, please let me know if:
- Your computer recognizes the disc after it’s inserted.
- You see any prompts after inserting the disc.
- The app gives you any error messages when you press the start button.
- The exact name/version of the app you’re using with the disc.

Meanwhile, here are some steps you can try to get started:

1. Insert the Disc Correctly
Make sure the disc is clean and inserted firmly into your computer’s optical drive.

2. Wait for the Computer to Recognize the Disc
Once inserted, your Windows 10 device should recognize the disc. You can check by opening “This PC” (or “My Computer”) and seeing if the disc appears under Devices and drives.

3. Launch the LDS Family History App
Open the app you want to use. Some apps auto-detect the disc, but if it doesn’t, look for an “Insert Disc” or “Load Disc” option within the app.

4. Press the Start Button
After the disc is detected, press the start button inside the app to begin playing or accessing the content on the disc.

5. If the Disc Isn’t Recognized or the App Won’t Start
- Try restarting your computer with the disc already inserted.
- Check if the optical drive is working by testing with another disc if available.
- Update your device drivers for the optical drive via Device Manager.

If you’ve tried these already or experience a specific error, please share the details so I can guide you further. Also, do let me know what kind of content you expect to see or do when the disc plays (e.g., a family history program, videos, interactive guides).

Does this help so far? If not, I’m here to walk you through the next steps!