If you want to edit a plugin's name, use this guide. This guide uses the .obj importer as an example.

1. Get the name of the plugin. Click the "Plugins" menu, and find it there. In this case "OBJ Importer".

2. Go to Google SketchUp's Plugin folder, right click on the plugin ("obj_importer.rb") and select "Edit with Notepad++". You need to have Notepad++ installed, and I recommend it. NP++ has syntax highlighting.

3. Find (Ctrl+F) "UI.menu": "menu = UI.menu("Plugins").add_submenu("OBJ Importer")"

4. You'll want to edit the name in the quotes. (".add_submenu("Plugin Name Here")

5. Restart or Open SketchUp, and your plug-in should have it's name edited.

NOTE: I recommend keeping a backup of the original source if you want to re-share the plugin.