Upgrading Instruction:

cd /usr/local/cwpsrv/var/services
cp -R roundcube /root/
git clone https://github.com/roundcube/roundcubemail.git
cd roundcubemail
bin/installto.sh /usr/local/cwpsrv/var/services/roundcube
cd ..
chown -R cwpsvc:cwpsvc roundcube
rm -rf roundcubemail