I have Fusion 8 on a MacBook with OSX Yosemite, V 10.10.5

I get a message that says: New Features are available for your virtual machine.

                                             To upgrade, power off this virtual machine and choose “Virtual Machine>Settings…>Compatibility”

I cannot proceed with using Fusion 8 until I do this upgrade. How do I power off the virtual machine and go through the rest of the upgrade process?

And while the question may have a simple answer, I am not computer literate at all, thus my reason for asking. Thank you.