The data Panel needs improvements plain and simple. It's just not very intuitive in its current state, but its almost there.
There are a lot of things that could make this better, but I want to narrow it down to just one, and its the simplest easiest addition/change.
The "Back Button"! Add one that takes you back a single level and maybe change the current Back Button to a Home Icon since this takes you back to your severs root folder.
Seriously, probably like an hour or less of work, and it would alleviate a ton of user frustration, especially with new users. There are some UI standards that are just second nature to regular computer users now. Its like the standard is English. Your UI is still in English, but it has a heavy accent and tends to mumble a bit.