I'm not sure if there is an option to turn zero click off through the account interface but you could definitely ask the support to not show zero click ads on your domains (not sure if they will agree to it though)
There are a couple other options you could go for, if you're willing.
-if you only care for monetization, choose any other parking service but sedo. Any out of ParkingCrew, Bodis, Voodoo, namedrive are good choices.
Note that all the above services have the option to not show zero click ads.
-if your domains' primary purpose is resale then you can use either ParkingCrew, Bodis or Voodoo for ads and redirect the sale page to SEDO (if indeed you prefer sedo to handle your sales)
that way you can maximise your ad parking earnings and at the same time use your favourite marketplace