To use the new JIRA Client build with its updaated Cloud authenticatio mechanism, please do the following:
1. Install the build on the system. Make sure that you have a JIRA Client license with active maintenance.
2. Log in to your account at Atlassian.com
3. Launch JIRA Client. Type your Jira Cloud address in the URL field and select the 'Jira Cloud' option.
4. Once the option is selected, the 'API Token' link will appear. Clicking on it will redirect you to your Atlassian profile, where you can create a new token clicking 'Create API token'. When the token is created, Copy it to clipboard.
5. Return to JIRA Client and type in your username, paste the copied token and click Next.
6. When the connection is successful, proceed with further configuration.