Since my Denodo Platform 6.0 Standard(Update 20180628) had the “Reset Layout” available. I browsed the Release Notes of the previous updates and found the Reset Layout option was introduced starting from the update “denodo-vdp-v60-update-20170925”, so the Denodo Platform earlier than this update will not have the “Reset Layout” option. This update needs to be applied for both Virtual DataPort server(s) and any standalone Virtual DataPort Client(s) installed. I would make sure this by navigating to “Help” -> “About Virtual DataPort” of the Virtual DataPort Administration tool.
As for the Express Edition, It is possible you were on an older version of Denodo Express Edition 6.0, you can download the latest Denodo Platform Express Edition 6.0 from the community site at [DENODO EXPRESS 6.0](https://community.denodo.com/express/download/6.0 )
Hope this helps.