Hey thanks for you feedback.
As for your questions, I prefer a clean user interface with as little text as possible. I try to pick the right icons which visually explain the function behind it.
To your second question, a manual is always nice, but currently the UI isn't finished. It would be a nightmare to update the manual every version. For this case I added the tutorial at the first startup of the program, maybe I could add a button, to rerun the tutorial.
Last but not least I will look to improve the bulk import. Your idea is nice I will see how I can implement it.