Nice to have you back. I know it's too late now, bit if your PC has room, how about fitting a second cheap hard drive as a back up device. Two or three minutes doing a simple bit of copying once or twice a week would prevent a lot of

and

and

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Or even a USB external hard drive if you don't fancy messing with the computer's innards. Backups take a bit longer, but still just as easy.
Hope you can find those plans again. I once found a great source of out of copyright classical music and just didn't bother to download the stuff. When I needed it, of course the site had gone.
Andy