You can revert back either by rebooting your machine or by using one of the other commands available in the command line interface. For example, “server:asw.off” disables asw. “server:asw.auto” will revert asw back to the CPU, as will any of the “server:asw.clock” commands (clock30, clock18, clock45, etc).
The best way to learn about this stuff is to type “help” and look at all of the various commands available.