5.1.1 How Do I Install and Activate My Compiler?

Installation of the license is performed by the XC compiler installer. Activation is available online through mySoftware. For full instructions, refer to the following document. It is available for download from the Microchip Technology website: 
www.microchip.com/mplab/compilers

“Installing and Licensing MPLAB® XC C Compilers” (DS50002059).