A problem occuring when importing vmds with mmd4mecanim

I want to import a model and several motions (vmd) for mmd into unity, so I downloaded and installed mmd4mecanim. As it allows for importing more than one vmd, I dragged two vmds into it and clicked "process". However, after that I cannot find any motion file under the assets. Still, I can preview two motions in the inspector windows. I tried import only one vmd, and this time the motion appears.


Why did it happen? How can I import several different vmds into unity and make them work properly?
I am a starter so any suggestion is helpful. Thank you!

 

I've solved this problem. It seems that you need to change the "FBX path".