Doesnt work – rejects all files, only solution is to upgrade to Premium

I was looking for a simple plugin for users to upload a singular jpeg or PDF to my website. This plugin rejects every file that is uploaded. I tried uploading several different types (jpeg, PDF and .doc) and it rejected all of them, saying each one was suspicious. The way around this according to the plugin page is to set up the Quarantine feature. But of course the quarantine feature is only possible by upgrading to the Premium version, rendering this app completely useless unless you pay to upgrade.