The retail versions of Pagico include an Extras folder, which offers a few Mac OS X system services that let you quickly turn text selections in any app into tasks and notes in Pagico. It also contains an Alfred PowerPack 2 action for PowerPack users to quickly save tasks and notes. But if you obtained Pagico through Setapp, the default installation does not get you the Extras folder.
But no worries, you are not left out! Simply download from below, extract, and take a quick read of the Readme file to get started.