问题1的答案是再次运行始终加密"向导，然后选择纯文本"作为加密类型".

The answer for question 1) is to run the Always Encrypted wizard again and select "Plaintext" as Encryption Type.

侧面说明:我必须删除位列的默认值约束，以使向导完整无误.

Side note: I had to remove a default value constraint on a bit column to make the wizard complete without errors.