Yes. You have rights to use them and sell it as long as its all made in VideoMAkerFX.
The music is by Chan Redfield http://www.chanredfield.com and he has licensed the music to VideoMakerFX and users can use it ONLY in their exported video from VideoMakerFX, the music may not be used by itself in any circumstances, only in videos that are exported from VideoMakerFX.