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As for command line vs manual update, we don't handle the update of the DLL plugin, if SER detects a new version it is installed through SER.
DLL updates are handled when pressing START with SER. Engine updates are the same as SEREngines v1
As for your example, the one for 2/2/1017 must be when you first installed it or something? As we haven't pushed a DLL update in over a week.