Hi everybody who have the issue.
1. Before update you can using next fix:
chown postfix /usr/local/cwpsrv/htdocs/resources/admin/include/postfix.php
chmod 644 /usr/local/cwpsrv/htdocs/resources/admin/include/postfix.php
chattr +i /usr/local/cwpsrv/htdocs/resources/admin/include/postfix.php
(last will be disable any maniulations with the file)
2.
Is this project still active? It seems like developer do not care to fix some basic yet important function... Not even care to reply bug report. This is really bad.
100% Free software = Developer do not care to fix bugs?
actually, we're care about all bugs, but we're can not respond if we do not have any fix.