It installs MailScanner version v4.84.5 which according to the change log was released 5/3/2012. Is it possible to install/support version 4.85.2-2 which was released 13 April 2015?
EDIT:
Is it as simple as changing the following two lines in msinstall.pl?
# Set this to "1" load the included version of MailScanner. Set to "0" to
# download from the URL set in $mailscanner
$local = 1;
# URL to MailScanner tarball
$mailscanner = 'http://www.mailscanner.info/files/4/tar/MailScanner-install-4.84.5-2.tar.gz';
Is the script confirmed working with version 4.85.2-2?