Plugin update

We bought the pro version of the plugin, but it seems to habe updated to newer version, but we didn’t get any updated files. The PDF are not displaying anymore, and when I install the free version from the WP repositary, we got an error message that says “PDF.js v1.4.20 (build: b15f335) Message: file origin does not match viewer’s”

Please help.

The page I need help with: [log in to see the link]