No there isn't. You'll have to generate a new md5 hash (search google for a free generator) and eit the users table in phpmyadmin.
Thanks for replays, i try after the job. I dont understand why i snot working my pass. I have never sharedd any of my passes and have also no viruses ect.
WTF i tryed now from work and my pass is working again. I cant understand, but anyway i change it now for sure