Update Getting-Started-with-Balance-Ball.md

docs/Getting-Started-with-Balance-Ball.md

 every training run are saved to the same directory and will all be included 
 on the same graph.
 
-To summarize, go to your Anaconda command line, activate the ml-agents environment, enter the `ml-agents` directory and type: 
+To summarize, go to your command line, enter the `ml-agents` directory and type: 
+**Note**: If you're using Anaconda, don't forget to activate the ml-agents environment first.
 
 The `--train` flag tells ML-Agents to run in training mode. `env_file_path` should be the path to the Unity executable that was just created.