So.. TBSYS account can be change like normal Oracle accounts. For example:
1. Login in SQL Plus (with SYSTEM)
2. unlock account with "alter user TBSYS account unlock;"
3. change the password, if you need with "alter user TBSYS identified by TBSYS;"
Here is a little tip if you are using Topobase in a test environment and you are using the sample data that comes with the product or if your account is getting locked frequently due to incorrect logins.
Here is the workaround:
Log into SQLPlus as your system user and run the following
CREATE PROFILE DEFAULT_TOPOPASE
LIMIT FAILED_LOGIN_ATTEMPTS UNLIMITED;
ALTER USER TBSYS PROFILE DEFAULT_TOPOBASE;