Maybe try the " Download to Browser " Option !
1. Go to the track ( Audio ) that you want download !
2. Take a look at the left side above the Graphic of the Audio " Download " .
3. Click on the down arrow next to the word Download and you will see " To Browser "
Choose this and it should work to download !
I hope someone with a better english will help you with this and also with the App Download but for now just this :-)
Have fun !