After the terminal outputs this message the training is still running in background...
You can use the command
top from linux to check if the training is still running... if you see HRest, HInit or other HTS/HTK functions, the training is still running...
After the end of your simulation, the first step to do is to check the folder /gen to see if the Demo generated the test samples successfully... If yes, you can get the model in the folder /voices and use hts_engine to generate some sentences (see that you should provide as input label files in the HTS format).