Yes, but currently both solutions - Win GUI Storj Node Toolbox and PowerShell script to setup multiple Windows GUI nodes uses only one storagenode-updater for the main node. The last one solution have some undocumented feature, that all nodes are updated automatically for the author because they use the same storagenode binary for all instances, unlike the first one.
But there are drawbacks, including updating all nodes in the same time, which can shutdown the whole setup on the case of a bug.
It would work properly if storagenode-updater would be installed for each service and each service would use the own binary for storagenode and storagenode-updater to follow the rolling update and do not have bugs like they have now.