To check which version of InVision you're using, navigate to the top right of your account and click your profile. Depending on your version, there will be an InVision V7 badge or an InVision V6 badge.
InVision V7:

InVision V6:

The InVision V7 platform looks and behaves differently than InVision V6, so if you have questions, check out the V7 product documentation and knowledge base.
If you still need help, you can always reach out to the InVision Support team.