During the process of linking accounts to online downloads Quicken prompts me to create an additional offline account called "Checking". If I try to rename it from "Checking" to the name I have always used for the account, it tells me the name is already in use.
I have had this account linked for years, and my credit union tells me nothing has changed on their end. Quicken telephone support tells me that the credit union must not allow linking. I can download transactions manually.