Custom Properties 3+ // PHP 7.1

I bought it and now I received an e-mail with

Custom Properties 3 for Joomla 3.x
Mod cpmenu
Component
Mod cpnews_show
Mod cpsearch
Cptags - search plugin
Cptags - editor-xtd plugin
Installer
Plugin for DocMan 2 content elements
Mod cpcloud
Cptags - content plugin
Mod cpsearch

Do I need to install all these elements separately?

The quicker way is to install only "Installer", that will take care of upgrading the component, plugins and modules at once.

(You find all the parts that compounds Custom Propertis extension listed separately, in case you want to do a custom installation and decide what to use and what not use)