Members PSW

I run an invision ***rd and there is a certain member that is doing some really bothering things and trying to ruin me. So since i run the forum i can access the db, is there anyway i can find out his password? It's not one of those invision free ***rds.

Find the row in the database corresponding to the problem-causing user, then find the password field. Get the MD5 hash from it and crack it.