Once I upgrade the mastercode to v.6 to work with the autonomous libraries do I have to downgrade back v.5 to use the vex starup code?
No, the Master Code version (latest) is all you need. You do not have to change back to version (previous).
Once I upgrade the mastercode to v.6 to work with the autonomous libraries do I have to downgrade back v.5 to use the vex starup code?
No, the Master Code version (latest) is all you need. You do not have to change back to version (previous).