Moliplayer and AV Remote

[ANDYS01]

Hi all, this might be a stupid question,
just upgrade my Lumia 1020 to 8.1 Dev Preview,
and installed AV Remote and Moliplayer Pro, both paid version
both of them works the way I want from my NAS
but I don't know how to quit out completely after play MP3 file from the NAS, can not see X when holding back button
the MP3 keep playing!! Can someone play guide me?
Thanks in advance

 

[Darren Walsh]

Try to pull the app down

 

[ANDYS01]

Try to pull the app down

Hi there, I can not see any app running, the only way I could see it is when I press the side volume button
and only can control the volume and pause the music!
no idea what is playing the mp3?
And thanks for the reply.