To add to what Erwin said, if you're using the simple built-in database you can also find the files under deployment\data\database\hsqldb
This depends on the database that you are using. If you're using the built-in database the modeler has an option in the console screen (by default at the bottom of the screen) under the advanced menu called Start built-in database viewer. With this viewer you can access the database. If you're using postgres, MS SQL or Oracle as database, you can use the tools that come with these databases.
Can I still do tios