Hi tungdo,
1) Get access to the console and execute:
mpc find genre "(0)Blues"
You will get the paths to the songs in your library.
Check the genre with mp3tag or any other tagging software.
2) No
Frank
- Get access to the console:
Use SSH from your PC
- If you are not familiar with SSH read this for Windows or this for Linux/MacOS
The default login for RuneAudio is "root" with the password "rune" (without quotes).