Sony walkman content transfer

Hello,

I accidentally deleted the content transfer software from my computer.
I downloaded it again, but now it doesn't work.
It recognizes my device, but when I drag a song onto the content transfer it just won't do anything.
Like, it says it's loading it, but it just stays that way forever.

Does anyone know what I can do about this?
Or, alternatively, is there any other way to transfer music to my sony walkman?