Sadly it doesn’t look like that’s an option AFAIK.
TLDR: EvenVCO hasn’t historically had a dataFromJson override, so doesn’t save a “data” field in JSON. The updated module can’t even try to check for the existence of a “Remove DC” parameter in old patches until the patch has been saved (by which time it’s too late as default “Remove DC = True” has been saved, rather than legacy behaviour).
I’m wary of making previous-patch-effecting changes, so maybe it’s best added as an option but default off. 
And I learn @dhemery’s lesson:
Lesson learned: Always override
dataFromJson()to create a “data” field.