you mean 'how can i use ..."?
to switch to standard edition, just download and install it in the same install directory (e.g. /usr/local/lsws) and choose (U)pgrade option.
keep in mind standard edition can only import 5 vhosts from apache httpd.conf and serve up to 150 max concurrent connections. if you have more than 5 vhosts in apache conf, you have to manually create those in lsws native vhost conf. otherwise, some of the sites/vhosts would not work.
