Hello Curious Tot,
Can you try the Audio wizard:
- Go to the Support screen
- Click on Support Tools and launch the Little Reader Support Tools (a smaller window will pop up)
- Go to "Sound Problems?" and start the wizard
This tool will do the troubleshooting and the necessary fixes for you, and hopefully it will get fixed!
If the problem persists, you may also try re-downloading and installing LR. We uploaded a newer build just last night, and you will notice that everything in your Account page's LR tab now contains LR 2.0 downloads.
Again, if there are still problems, do send us a diagnostic report so we can address this issue immediately