Redownloading iTunes song purchases in higher bitrate
I have a number of prior songs purchased on iTunes in the older 128 kbps "Protected AAC" format. How can I upgrade these Apple purchased songs to the present standard 256 kbps "Purchased AAC" format?
Additionally & Ideally, is it possible to upgrade these to Apple Lossless or AIFF format?
Some notes: I have a fairly large music library, I'm not a subscriber to Apple Music, but would pay for Apple Match if it helped solve this problem. I don't care about file size and I use a PC with Windows 10 Pro.
Windows, Windows 10