This plugin allows atom to open specific "unsupported" file types using your system's default application for that file type.
To open a file externally, simply double click on the item in the project pane.
By default the plugin declares a list of known extensions that can be opened
externally. You may disable the behaviour for these default filetypes using the
toggles available in the plugin's configuration.
To mark more filetypes as "unsupported" you can write them in the "Custom extensions"
section using comma separated values. (Eg:.myext,.myotherext,asd)
This package is part of the starbound modding package suite for atom, all plugins are maintained and modified by C0bra5.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.