Ah I see now. Our payloads use MIPS1 file format:

    $ file ~/Desktop/mips.bin
    ELF 32-bit LSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, corrupted section header size

You'd need to create a new exe template for MIPS-32 and drop it in `data/templates`. If the instruction set didn't change much between MIPS-1 and MIPS-32 the shellcode should hopefully still work. If not you'd have to write new shellcode payloads as well.