The financial institution for J Crew changed from Comenity to Synchrony, but the J Crew Credit card link in Quicken is still Comenity. GE Money Bank also changed to MySynchrony, but that is not an option in Quicken. Synchrony Credit Cards do not have the same interface as MySynchrony.
So, for credit cards such as J Crew, Sleep Number, Home Design, etc., the current way to get them to work with Quicken is to set them up with GE Money Bank as the financial institution.
Hope this is helpful to someone!