Archiving a Series
To archive a Series, click the three vertical dots next to the Series you want to archive, then select 'Archive' from the menu.
A window will appear giving you two options:
Archive Series only: Select this option if you want to archive the Series (folder), but keep the Episodes active. The Episodes will return to the normal Episode overview, but will be detached from a Series.
Archive all: Select this option if you want to archive both the Series, as well as all the Episodes within the Series.
Unarchiving a Series
To unarchive a Series, go to the 'Archived' section in the sidebar on the left of the Episode overview. Next, go to the 'Series' tab within the archive to see your archived Series.
Using the action menu (three vertical dots) at the back of the Series, select 'Unarchive' to unarchive the Series.