I've been unable to get the research function to work on the latest versions as well. I've tried Drathe's workaround multiple times, but no luck. Also on Inferno DLC.
If you think the latest patch broke the trainer.
Please use the update notification system to report a game patch, update or to report that the trainer may not be working with the latest version of the game. If 3 or more reports have been filed, consider BOOSTING the priority of this title for a faster turnaround on the updated trainer.