If you have IntelliJ IDEA installed you can get CUBA Studio as a plugin:
  1. Start IntelliJ IDEA 2018.3 or newer.
  2. Open the Plugins dialog.
  3. Click to the "gear" icon and select Manage Plugin Repositories.
  4. Click Add and enter the following in the Repository URL field:
    https://plugins.jetbrains.com/plugins/haulmont/list
  5. After adding the repository, switch to the Marketplace tab.
  6. Enter the following into the search field:
    repository:"https://plugins.jetbrains.com/plugins/haulmont/list"
  7. You will see the CUBA plugin in search results.
  8. Click Install and follow further instructions of the IDE.