[chirpy]

Looks like you missed out some of this bit:

cd /usr/mailscanner/etc/
mv MailScanner.conf.new MailScanner.conf.old # MailScanner.conf.new may not exist, don't worry about it
cd reports/en
mv languages.conf.new languages.conf.old # languages.conf.new may not exist, don't worry about it
cd /usr/mailscanner.new/etc/
mv MailScanner.conf MailScanner.conf.new
mv virus.scanners.conf virus.scanners.conf.new
cd reports/en
mv languages.conf languages.conf.new
cd ../..
cp -Rf /usr/mailscanner/etc/* ./
mv virus.scanners.conf.new virus.scanners.conf
cd reports/en/
mv languages.conf.new languages.conf

You can recover it by downloading the tar.gz file again, then open it up and go to the directories in this distribution for languages.conf and then virus.scanners.conf and copy those new files over the top of the ones now in your /usr/mailscanner/etc/ directory tree.

Let me know if you want more specific instructions.