Preferences / Options
Alchemy has several options that can be set in the Preferences/Options window. This can be accessed on Windows/Linux under the Menu bar > Settings > Options... or on OS X using the Menu bar > Alchemy > Preferences...
Here you can switch between the Simple and Standard interface and also select which modules to activate. Using the Restore Defaults button will revert to the default set of modules. Changes here take effect once you have restarted the application.