Perfectly compatible with classic plugins and older hardware debuggers that sometimes struggle with v6.xx.
MPLAB® Development Ecosystem Downloads Archive * MPLAB X IDE v5. ... * MPLAB XC8 v2. ... * MPLAB XC16 v1. ... * MPLAB XC32 v2. Microchip Technology MPLAB® X IDE - Microchip Technology download mplab x ide v5.35