There's no need to solicit help from random people, just contact the developers, Indie Stone. Send them an email and ask them to re-send your password. They're a friendly bunch, and I can pretty much guarantee they'll be helpful.
Actually, before you contact Indie Stone, you should probably check your old emails. Unless for some reason you've deleted it, the original email containing your password should still be somewhere in your inbox. Search your email for "zomboid" or "indie stone studios", and I'm sure you'll find it.
MariusLV
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