How do I use the Save Draft module for a particular content type only? I want to use the Save Draft module for a particular content type. When I install this module by default, it will be applied to all the content types. Please let me know how to avoid this.

I'm using version 7.x-1.4 of the module.
Currently you have to install the 7.x-1.x-dev version to get settings per content type.

Once you install that version you can configure the settings on the node type settings form (eg. admin/structure/types/manage/article).