I'm pretty sure I used to drag .wav files into the tracks, but now It's not allowing me to.  I know it's been months since I used the program, but the software on my computer shouldn't have changed.  What am I doing wrong (I'm signing in as administrator) when I pull the program up.  I'm using Magix music maker 17 and bought the license to go with it so I can create music commercially with it.

Help please...anyone?