Download MPLAB-X SDK For MPLAB X IDE 5.0.0:

Download MPLAB-X SDK 5.0.0

What's New in v5.0.0
>> New Project format – Projects created in or updated to v5.00 are not backward compatible! However, there is a plugin you can use to revert projects (Tools>Plugins>Available Plugins>Save As v4.xx Project)

MPLAB X IDE projects now support packs, found under \v5.00\packs. Packs contain versioned device information.

>> Support for AVR devices using Atmel-ICE (EDBG) or PICkit 4 (UPDI) – Selected AVR devices supported only on stated tools.

>> Support for Atmel-ICE (EDBG) – Atmel embedded debugger (EDBG) support using Atmel-ICE.

>> MPLAB XC8 AVR support – Support for AVR devices in MPLAB XC8 v2.00.

>> AVR Language tool support – Support for AVR GCC and AVRASM2.

>> Support for some Dual Core Devices – Support added for some dual core (dsPIC33C) devices.

For more details please refer readme...,