SMALL QUESTION REGARDING EXPORTING PROJECT...

Before I go ahead and fudge something up when I decide to release an updated version of my latest project, do add-ons/Plugins simply STAY there if you simply export the project into a folder for others to play? Like there's nothing special I have to do to insure the version I upload includes the plugins I've recently added?

I have this strange paranoia of exporting the project, uploading it, and having someone download it only to find none of the plugins stuck because of something I forgot to do. Haha. =P