Hello, I recently finished building/configuring my home All-In-One, which is on ESXi v5.1 Update 1. I did not realize that there is now ESXi v5.5! I have ESXi installed to a USB flash drive. Is there a recommended way to upgrade to v5.5? With Windows OS, I personally always do fresh install's when upgrading. Should I keep same mentality for ESXi? Can I simply just reformat the flash drive and re-install ESXi from scratch? Hopefully the product key will transfer over, since it is the same system. I currently have one VM running which is OmniOS. I plan to delete this VM anyhow and re-install from scratch for the sake of practice/learning. Appreciate any advice!