The MS SQL scripts I provided DROP the database and database owner for the included DB's and DBO's. The scripts will then define a new database and associated database owner for each set of product databases. Assuming you only ran the scripts for the Identity Manager (IM) databases, the DDL to define the tables and load default data is executed on the next start of the IM application. You would have run stop_im from the config user, redefine the IM application DB's and then run start_im from the config user. Using view_im_log you will see the DB initialization steps starting and ending before the IME is started.
You should open a Support Case and upload the logs to allow Support to look for an error. If you share the Support Case # on this thread, I will also review the logs to see if the expected steps are executed on the restart of IM.
Take care.