Okay after refreshing the boot loader, it allows an upload of the small sketch, though still fails after uploading the actual openbci code. Is it possible to flash the entire program with the Pickit? 

I will get a tutorial up soon. For now, please connect the picKit3 thusly:

I have tried the MPLAB X IDE v2.35, the UDB32-MX2-DIP.hex file is import from the File>Import>Hex/ELF..File, and the hardware tool is chosen as PICkit3/ SN:BUR132284452. And I don't do a

I'm using mplab ipe and a pickit 3, I could program the bootloader UDB32-MX2-DIP.hex without any problems.