After you've finished the simulation, it can't be replayed. The theory pages, however, are available from the start page.
By selecting the "Read theory" button to the left of the "Play" button, you can review the Theory pages for a simulation.

Additionally, you can select the "Theory" tab on the LabPad at any point while the simulation is running.
Note that the quizzes' answers cannot be provided by our Support team. Here are some hints if you're having trouble answering a question:
If you are having any technical difficulties, please check our Basic Troubleshooting guide:
Please do not hesitate to reach out to our support team if you have any questions or are in need of assistance.