Why did my account not upgrade to Premium? Virag 27 August 2019 12:42 Updated If a new user signed up via your personal referral link, but your account didn't upgrade to premium, please email us at firstname.lastname@example.org. Related articles How can I choose which PDFs to save to my Locker? What is the friend referral promotion? What is Kopernio’s business model and how can you offer it for free? How can I set up/change my Dropbox integration? I can't access my account. How can I reset my password? Comments 0 comments Please sign in to leave a comment.