I am evaluating Portfolio for Jira and can only use "live plans". I want to try to use the "improved interface".
We're using Jira Software for cloud.
I can't find any version numbers for Portfolio nor can I find a way to ensure that v3.x is installed.
All software versions on the Cloud platform are managed by Atlassian. There is not yet a Cloud equivalent for Portfolio 3 for Jira Server ready. When there is, Atlassian will update you to it when they're ready to do it.