Update README.md

Author: Zebbeni

README.md

@@ -17,7 +17,7 @@ To see an example:
 
 1. Download and install [Processing](http://www.processing.org/)
 2. Clone or download CardCreator to your local machine.
-3. Open _CardCreator.pde_ in Processing
+3. Open _CardCreator.pde_ in the Processing IDE.
 4. Hit Play 
 
  ![Alt text](example_media/processing_play.png)