Open Source Document Management System | OpenKM

Are you using default OpenKM configuration or not ? In afirmative case:
1- stop jboss
2- go to /server/default/data/hypersonic and edit file OpenKM.script
Search okmAdmin you must see something like
INSERT INTO OKM_USER VALUES('okmAdmin','Administrator','21232f297a57a5a743894a0e4a801fc3', etc...
The '21232f297a57a5a743894a0e4a801fc3' is the 'admin' password replace yours for this.

Password not change automagically. Be sure you changed the hibernate.hbm2ddl property from create to none.

You might only have one application.url not two.
Which OpenKM version do you have ?
Password is encrypted and can not be decrypt, that the reason why I've provided the password "admin" is the text "'21232f297a57a5a743894a0e4a801fc3" in database.