File saved in the wrong format

Hello, I installed the Amerigo app to download music. Everything works very well except that the files are saved as .bin instead of being in mp4 with strange names (0e0aa0da-b4eb64fa42-d27df19db2d6.bin). As long as I'm on the phone that downloaded them, I can play them, but if I transfer them to another device, I can't anymore, and I have to convert each song one by one. Converting to mp4 is pretty quick, but finding the titles is not. Does anyone know a site to translate the song names (and to convert many files at once, I have over 600 songs to do)? Have a good day.