help regarding third party library

Hi All

I have a mecanum wheel robot with sabertooth motor control and kangaroo motion controller. I went to the Dimension Engineering to download the appropriate libraries for the coding of my project.

I was able to add the libraries. It is showing in the Sketch---> import library drop down menu. But whenever I click on the library to be included in the program the cursor just goes down one line and nothing is displayed. It does not happen with the default core libraries. They are included fine.

Could anyone help me and let me know if I am missing something.

a library should be in the subdirectory libraries, then under a subdir with same name of lib look in the directory for example and in this put all files the only thing import does is write include in top of program.