Hi Ignasius,
What do you want to edit? If you are just starting out I suggest you follow this learning path to understand the basics of Mendix: https://academy.mendix.com/link/paths/31/Become-a-Rapid-Developer
Also from version 9.21 and up the Mendix Studio platform is not supported. You can read about it here:
https://www.mendix.com/blog/coming-in-2023-the-merging-of-studio-and-studio-pro/