Using ESXCLI

Remove VIB:
esxcli software vib remove  --vibname=extrasphere

Initiate Upgrade (ex. 6.0 to 6.5):
Open http:

esxcli network firewall ruleset set -e true -r httpClient

List available Packages:

 esxcli software sources profile list -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml | grep -i ESXi-6.5

esxcli software profile update -p ESXi-6.5.0-4564106-standard -d http://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml