How to remove the Max DB instances while uninstalling it - i forgot PWD

Hi All

I was being used MaxDB on installing the CE 7.1 portal which was done perfectly.

Currently i am trying to uninstalling the CE 7.1 in which it was asking the password for MaxDB instances , which i forgot.

Can u pls suggest what is the another alternative to drop the Max DB instances from system without entering the password which i forgot.

Thanks in advance.

Thanks,

Kalki Reddy