No idea about the site, never heard of it. Pretty sure FLACs couldn’t harm your PC (correct me if I’m wrong).
Buuuuuut if you’re gonna download another FLAC from the internet I think it would be safer to get it from either doubledouble.top, the Slav Art Divolt channel, or just Soulseek like the other dude mentioned.
Mostly for me, Qobuz rips (through SlavArt) are the best. But if for some reason you can’t get what you want on Qobuz, I typically look it up on Soulseek and 99% of the time I found what I’m looking for