Actually, yes there is …
You can save all correction/settings to a Custom preset - then save that preset as (effectively) a Nik Silver Efex Pro sidecar (.np) file. Then, you can later re-apply the saved correction/settings by importing the saved “sidecar” file … as a starting point for further refinements.
Note: When saving correction/settings to a Custom preset, if you hold down the Shift-key at the same time as you “Click to update this preset with the current settings” then your Control Point data will also be saved.
More info on this process here.
Please add you vote here, to enable this process to be automated.
Regards, John M