You've asked for it a few month ago, but i found the time to manage to do it.
This is the Real LiveLink i wanted at the start.
(No More PopUp for file destination)
I will record a video tonight to show you this update.
Refer to the Readme to know more about it.
Livelink and Livelink (Save) are now available
No More PopUp
2-> Livelink (Save) - [Floopy disk icon]
Here it's the same system as the previous build. You can define and store the FBX export in a specific location.