Change SVN password or remove stored passord from SVN eclipse plugin

In windows;
remove the following folder
C:\Documents and Settings\…..\Application Data\Subversion\auth\
eg: C:\Documents and Settings\jijo\Application Data\Subversion\auth 
Some times 'Application Data' is hidden.Please enable 'show hidden files' in file system.

Then Remove the auth folder.
In the auth folder you can find the following folders,
svn.simple
svn.ssl.client-passphrase
svn.ssl.server
svn.username


In linux :
~/.subversion/auth
This folder is hidden.Please enable the 'show hidden files'  in file system.Then remove the auth folder.

After the next saving from eclipse to SVN , password option will come.

NB: If you are not found the above path, search the auth folder,and check whether is SVN related and then remove that folder.