I think that the answer is yes, you can do it from the console (if you have access to the console), but probably no one knows offhand how to explain it.
I’m not sure whether votes are in their own table or are custom fields. You’d need to look at the plugin code to see how votes are stored.
You’d loop through those things, add a like, and delete the vote. (This information is likely either self-evident or too vague to be useful.)