When basing custom mesh on some mesh like accessory in TSRWorkshop and replacing the textures, the other designs are still show in the CAS for this mesh - like if there's originally 3 colored styles for Ea's original mesh and you replace the first style the rest two are still in the CAS, how do I get rid of the other styles?

Hopefully you get wha I'm trying to ask here

When you pick the design in the dropdown in the Textures tab, you should be able to hit the little arrow next to the new design icon to the right, and hit Delete. That's how it works for objects anyway - I've never used TSRW for CAS stuff.

Works similar in TSRW
At the texture tab you select the outfit in the drop down menu and next to that menu you can choose delete or duplicate

Great it worked. Thanks guys