How do you log out?

I really like this app and Im using it to make a bachelorette party okay list. One question I have is how do you log out? I clicked the option of linking it to Facebook and i accidentally linked it to my business Facebook but Id like to link it to mine however I cant for the life of me figure it out. I cant contact them through the app because it is using the business email. HELP!

Ashlie5555 about Trebel Music - Free Music Downloader, v3.8.3