Raspberry Pi 3B image

Hi, 

I have a PI 3B and it seemed to be the default option a while ago. But today when I tried the latest image onss_1.2.0_full - it appeared to be non-functional on my Pi.
What is the image compatible with PI 3B and how can I download it? 
Or is the only option now to switch to PI 3B+?

Thanks!