A one-liner regex is not the most maintainable or efficient solution to this problem. But since you asked, here's a regex answer:
| | s/((?:^|\|)(?:[^"|]*"[^"|]*")*[^"|]*)"([^"|]*)(?=$|\|)/$1$2/g;
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The readability of that could be improved upon, however:
| | my $T = qr/[^"|]*/;
s/((?:^|\|)(?:$T"$T")*$T)"($T)(?=$|\|)/$1$2/go;
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Now here's how I would have really done it:
| | join '|', map { s/"([^"]*)$/$1/ if y/"// & 1; $_ } split /\|/;
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MeowChow
s aamecha.s a..a\u$&owag.print
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