This is for classic. Having trouble getting the bar color and threat to show properly as it used to before updating. Attached is a screenshot of what it's doing now, even when set to tank. I've tried deleting the addon, even clearing my saved variables folder and it's still not displaying the threat correctly.

What exactly is happening that is incorrect? It's kinda hard to tell from the image alone, as it appears to treat you as tank and the mobs healthbar is the safe/blue color while attacking you.

So you aren't a tank? Then you should set it to dps/healer if it assumes wrong.

In the pictures you linked it's behaving as expected, they're not really highlighting the issue you claim to have. If you don't want it to show a safe/blue color when mobs attack you the threat mode needs to be set to DPS.
The reason it assumes you are a tank on auto is because of the shield. What would really help is if you explain to me what you expect to happen, because I can't see any issues in these pictures.

Here is what it looks like on my warlock. When I'm tanking multiple mobs on my warrior I want to see that I have threat. It used to be like the screenshot from my warlock. For some reason now though it is reversed on my warrior.

Set your threat mode to 'Dps/Healer' and not 'Tank' if you want it to behave like you're a DPS, aka like on your warlock. It's always been reversed for tanks but the Auto mode doesn't always work in Classic.

I see.. I guess that makes sense. Thanks for your help! I kinda feel stupid now for not trying that to begin with. It just seemed a little counter intuitive.