Hello Mauro,
HANA Developer edition does not have Windows VM with the HANA studio pre-installed
To get landscape of Windows VM and HANA Dev edition you need to choose “Demo appliance landscape for the openSAP course "Next Steps in Software Development on SAP HANA"” https://cal.sap.com/subscription?sguid=1ab6df9f-1d2f-4f6c-b7f7-8ebe07eefb8a
More details on openSAP training landscape can be found here:
https://open.sap.com/courses/hana2/items/1L9WIE5o8R1n11uY4S9jDT
More details on HANA Developer edition and installing the client tools (including HANA Studio) can be found here:
How to create a SAP HANA Developer Edition in the cloud
Best Regards,
Ventsislav