i am trying to delete the watermarks on the latest app update but can not find it anywhere where to turn off.
Just before I updated it was under the sharing option.
Now it's not there.
What export option are you selecting? The watermark option should be available when you click on "Custom Settings" and you should see the "Include Watermark" option on the next screen.
When you Export the photo (using the up arrow) you should see this icon:
Watermarking moved to the export menu a while ago.
The problem is that you posted your question in the Lightroom (desktop) forum, so I gave you the answer that applies to the Lightroom (desktop) app. Now that I see you are using an iPhone, the answer would be different. As @selondon indicates, the watermark settings are now part of the individual export settings, so when you use the share icon you will be presented with quite a few options, many of which have that settings icon that he shows. When you select that, you will see the option to turn on/off the watermark feature, and this is where you would customize your watermark as needed.