Place the butter, yogurt, mayonnaise, garlic, cream cheese, shredded cheese, garlic salt, red pepper flakes and wine in the bowl of a food processor.
Process until smooth and creamy, stopping once or twice to scrape down the sides, about 2 minutes.
Scrape the cheese mixture into a mixing bowl and gently stir in the crab meat.
Place the English muffins on a baking sheet. Spread the cheese and crab mixture evenly on the cut side of the muffins, spreading all the way to the edges.
Freeze until firm, about 2 hours.
Cut each English muffin into four quarters and store in an airtight container until ready to cook, up to 3 months.
When ready to cook, preheat your broiler and place the crab appetizers on a baking sheet. Broil until golden brown and bubbly, about 5 minutes.