----------------
For cPanel
----------------
Please SSH to your server and run following command.

touch /usr/bin/chflags; chmod 755 /usr/bin/chflags;
rm -f /var/cpanel/rvglobalsoft/rvsitebuilder/rvsitebuilderversion.txt
perl /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/autoinstaller.cgi
rm -f /usr/bin/chflags

------------------------
For DirectAdmin
------------------------
Please SSH to your server and run following command.

touch /usr/bin/chflags; chmod 755 /usr/bin/chflags;
rm -f /usr/local/rvglobalsoft/rvsitebuilder/rvsitebuilderversion.txt
perl /usr/local/rvglobalsoft/rvsitebuilderinstaller/autoinstaller.cgi
rm -f /usr/bin/chflags