Can I re-import folders without getting duplicates?

I have downloaded eM Client version 6.0.24144.0 on a new Lenovo Yoga 700 running Windows 10. I have imported all my Outlook folders, subfolders and emails, contacts and calendar into eM Client. I have newer emails that I would like to export from Outlook on my other computer, some of which I have already moved into folders.  If I import again from Outlook, will it cause duplicates of folders, subfolders and emails? Thank you.

I am aware of the deduplicator, but from what I have seen it removes emails, but I see no mention of folders.