In order to get a list of clients, we’ll go to: 

Inf. and Statistics --> Customers

Once in this section, you will see three columns with different options:

Customers with address, with bank account, with balance, with observations, with family unit, with credit card... 

From all of them we must choose the option that best suits what we are looking for.

Once inside some option of the dropdown, we will be able to see a series of options and filters when looking for our clients; for example: date of high and low, age, sex etc. Then we will press the option get report (to get the report on screen) or on the contrary, if we want to work with it, we can export it to Excel.