Installation instructions for Ubuntu/Mint based machines:
Download proper deb installation file.
For 64 bit operating system use greatlittleradioplayer_1.4.1-0extras13.04.1_amd64.deb
For 32 bit operating system use greatlittleradioplayer_1.4.1-0extras13.04.1_i386.deb
Remove old version of Great Little Radio Player if you have it with your software center (For Ubuntu is Ubuntu Software Center)
You need to delete its configuration directory with flowing command: rm .config/glrp -r
If you don't do that, you will have old radio stations and it will not be added new ones.
Open and install Great Little Radio Player with your software center (For Ubuntu is Ubuntu Software Center)