mybb password recover

please if somebody could help me with the command to decrypt mybb forum hash ?

i wan't to use bruteforce using about 2 until 10 charactaire mix.

thank's soo much
This is not a site for requesting password cracking help. Please read the rules.
I need password crack it's my forum and i need test the software with GPU.
Sorry I miss read. here you go
i already seen there but i didin't found/understood how to do it !