The latest updates of wp-filebase pro and wp-filebase download logger seemed to me to claim to have fixed this problem. They definitely haven’t for me. The bug is perfectly reproducible: no notifications: downloads work fine, add notification, downloads fail going straight to a download notification page but not giving a download. WP 4.1 running LightFast theme with wp-filebase 0.3.0.06 (not activated), wp-filebase download logger 1.0.2 (activated), wp-filebase pro 3.2.05 (activated). I’m happy to try to collaborate with debugging this if you tell me how I can do that.