Can't un-save Local File

[papapyro]

Plan

Premium

Country

Ireland

Device

Acer Aspire 7

Operating System

Windows 10

My Question or Issue

I downloaded an .mp3 file and wanted to add it to 'Songs'. However, it only appeared in Local Files, so I went on my phone and was able to save it there, and it appeared in Songs fine. However, I later manually deleted the .mp3 file by accident, and now the song is greyed out and says "Spotify can't play this file right now. If you have the file on your computer you can import it." I re-downloaded the file and changed all the MP3 details to match what I had before, but I can't un-save it. I deleted the .bsk file and even re-installed but it seems to be stuck there.