Yes, that's it. If you want to find where the library is on your computer:
- File > Examples > Esplora > Beginners > EsploraAccelerometer
- Sketch > Show sketch folder - this will open the Esplora library's EsploraAccelerometer example sketch folder.
- Navigate up three folder levels to the Esplora folder. You will find the library source code in the src subfolder. You can open those files with a text editor and edit them as you like.