Plugins and profiles are seperate things; EDDI is a plugin(a piece of software that extends the functionality of VoiceAttack) to communicate with Elite:Dangerous and makes data from the game available in VoiceAttack.
The profile that comes with EDDI will likely have a basic set of commands that use and are used by the EDDI plugin.
To utilize the profile, you can import it into VoiceAttack as an additional profile using the
button or pressing ALT-I on the main window.
Then, you can attach it to your main profile by setting it as active, opening the "Edit a Profile" window using the
button on the main screen, going into the profile options using the
button, and selecting the "EDDI" profile in the "Include commands from another profile" dropdown.
By using this method rather than importing the commands from the other profile into yours, you can keep them entirely separate, but use both of them at the same time.
Note that to edit a profile, it needs to be active, so you'll have to switch to the "EDDI" profile to make changes to that, and back again to your main profile to use both.