The below command needs to be run on Each Host , it  will remove the old one and install the new one

esxcli software vib install -d https://update.nimblestorage.com/esx6.5/ncm/index.xml

The host then needs to be rebooted to install

You can add https://update.nimblestorage.com/esx6.5/ncm/index.xml , as an update location via Update Manager in Vmware Vcenter Server and Add a Host Basline Extension , then remediate this to the hosts as well