After pulling the latest update (10.1) to Logic, don’t be surprised if your Presonus Faderport stops working. All you need to do is download the same 64bit driver you installed for the previous version (10.0) and copy it back into the Logic application package content folder.

The reason for this is that as Logic get’s bumped to 10.1, the application package gets overwritten and your old Faderport bundle disappears.

In other words, just follow these instructions again and you should be all good.

(Also, you don’t need to delete your previous control surface settings in Logic before copying in the bundle again.)