I know how to import to the noise library, but is there way to remove music that I have already imported, without removing everything?
Yes it is possible.
- Right Click on the track you want to delete and select the last option asking to "Delete from library". Refer the first picture.
- A new Popup appears. The first option is to delete the music from the library and the pc, the second one is cancel option and the last one is your choice. It(last option) deletes the track only from the library. Refer the second picture.