If you are unable to log in to the web-based Urchin Administrative GUI as the admin user due to the password being lost or corrupted you can still reset the password as long as you can gain some type of command line access to the system running Urchin with the privileges of the user that Urchin runs as.
Linux:
Invoke a shell as the user that Urchin runs as, and change directory to the Urchin distribution. Then type type the following (line breaks added for readability):
cd /usr/local/urchin/util/
./uconf-driver action=set_parameter table=user \ name="(admin)" ct_password=urchin
Windows:
Start up a Command Prompt window and type the following (line breaks added for readability):
cd \Program Files\Urchin\util
uconf-driver action=set_parameter table=user \ name="(admin)" ct_password=urchin
In both examples, this sets the admin password to be "urchin".