It depends on the context. It could be a physical, activity, or even personality.
•Physical Tini tidak berubah, sejak dulu hingga sekarang dia masih terlihat ramping. Tini didn't change, since then until now she still looks slim.
•Activity (How she dresses, What she used to do, hobbies, etc). Tini tidak berubah, dia masih menggunakan kacamata. Tini didn't change, she is still wearing glasses.
•Personality Tini tidak berubah, dia selalu bersikap ramah kepada orang asing. Tini didn't change, she is always friendly to strangers.
It could aslo mean: Tini tidak berubah (Tini didn't change) = Tini is still the same as we used to know her.