Open a downloaded dmg file.
Move ShowyEdge icon into Applications icon.
Then, ShowyEdge will be installed into Applications.
Open ShowyEdge from Launchpad.
Preferences will be opened.
Change values if needed and then close the window.
ShowyEdge provides preset colors for many input sources.
Therefore you can use ShowyEdge without any configuration.
For example, a color bar becomes blue-white-red when you change input source to French.
You can configure colors by following procedures if there is no preset colors for your input source or you want to change the color.