Here are step-by-step instructions for a 6.0 to 6.1 upgrade. If you use heterogenous environment with windows based collectors check release notes (you will need to download different upgrade PAK file).
Clarify-it.com - Updating vR Ops 6.0 to 6.1 (vAPP update)
For german speaking here is the same article in german:
vR Ops 6.0 update auf vR Ops 6.1 | vgeht.de – Wie geht das mit dem Cloud?
