Typically, plug-ins got installed with the main program. But if you didn’t have them installed, you can manually download and install.
· Via Check for updates inside the program. Open Foxit PhantomPDF/Reader, click on Help menu, click on Check for Updates to select any available update there to download and install it.
· Via website. Go to one of the site accordingly, drop down the Add-on list, choose a desired add-on, and click on Free Download button.If the add-on you downloaded is .msi package,please double click on the .msi package to install it. If the add-on you downloaded is .fzip format package,pleaes go to Help tab in Foxit program,click on Install updates to navigate to select the .fzip file to install it.
For PhantomPDF, access: https://www.foxitsoftware.com/pdf-editor/addons.php?product=phantompdf
For Reader, access https://www.foxitsoftware.com/pdf-editor/addons.php