Unable to download UIflow 1.4.5.1 for Atom Lite

[UmbraAtrox]

When trying to download UIflow firmware for Atom Lite it wont download. Download button changes to retry. I then tried 1.7.1 and the download works. I'd rather have 1.4.5.1 because thats the latest stable (as far as i am aware). and my m5stack grey also runs 1.4.5.1

So can i download the binary manually somewhere? Or do you recommend updating to 1.7.1? Are there disadvantages to 1.7.1?