This is in the Q2A core, now.
Go to Admin > Viewing > Show answer form immediately, set it to "Always".
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.