VK downloading file name

When I download an .mp3 file from VK, I don't have the file name, just random number and letters. It's not a big problem, but I can feel better, if this problem will fix for me. My SaveFrom.net and Bowers version:

• Browser: Chrome 50.0.2661 Windows 10
• User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
• Extension: userjs-chrome 6.20.2

I hope you can fix the problem. Thanks for all! (Sorry for my english, it's not perfect ;))