To use Maintenance:
1. Click on OMS tab and Open Maintenance.

2. If everything is correct, the next window will appear:

3. Looking at this window, we see two fields.
- Entities, above.
- Codes, below, and different for each entity.
4. Click on any of the entities. For example, Security: Setup/Edit Securities, which is the entity opened by default.
5. The result provides you a list of your current securities.

6. Entities Details (right window in the picture above): Here, you can change the values as you wish. You can also delete it, copy it, and create a new one.
Make sure you press Save after any change you may apply.