Default Help with crypt7 ( WhatsApp)

hello, well first of all if i'm in a wrong section any moderator please move this.

i have a question and i want to know if anyone could help me...

i have the databases of whatsapp ( crypt7 ) on my pc ( not from my phone ) its from another phone and i want to odecrypt it so i can read the messages, i don't know how to do it.

I know how to read mine, i just want to know how to do in that case.

Thank youu!