What version of SoapUI/ReadyAPI! are you using? I'm running ReadyAPI! v2.6.0 and the password is obfuscated and has been for a while - I remember it wasn't in SoapUI v3.5 - but that was years ago!
if this helped answer the post, could you please mark it as 'solved'? Also if you consider whether the title of your post is relevant? Perhaps if the post is solved, it might make sense to update the Subject header field of the post to something more descriptive? This will help people when searching for problems. Ta