The PICkit3 in-circuit debugger/programmer uses Flash memory and in-circuit debugging logic built into each chip to provide a low-cost hardware debugger and programmer. And this upgrade kit is 3.5, your best choice!
After the upgrade advantages:
1. The firmware will never be lost, the firmware can be self-healing, to avoid the demolition case.
2. Offline programming will never crash, so download more smoothly and completely take over all versions of MPLAB, MPLAB x.
3. Each PICkit3.5 with unique serial number, can work under MPLAB X, multiple Kit3.5.
4. Increase the external power supply current, the output voltage is more stable.
5. Interface protection is more perfect