Hi @wwq1,
We provide 2 archives with FreeMASTER Driver. One is the plain archive with the source code and the second one is packaged as Eclipse Update Site. Could you make sure that you use the later version. It is highlighted in the picture bellow:

Then you can follow the steps as in the following print screen to install the update site from within S32DS:

If that does not work, please let us know at what step does is fails.