Recusal question ? Can I undo for new case?

Judges are supposed to avoid even the appearance of impropriety. Not only don't you want that judge sitting on your matter, neither does the judge: If the judge recused herself in the prior matter, they need to recuse in any matter involving you. The reason for this is that the judge does not want to be accused of retaliation against you if they were to take up the new matter and rule against you (rightly or wrongly). So having the judge not sit on the matter is in everyone's interest. best of luck to you