cannot remove css rule from layer once set

hi,

thanks for a great plugin!

i noticed the following:
1. I create a style, let's say .shadow
2. I create a layer in Sketch, and rename it to '.shadow'
3. The style is applied to my layer
4. Now I want to remove the style from that layer, or change to another one.
5. Changing the name of the layer does not remove the styling, and renaming the layer to a .no-shadow class (which in the stylesheet has box-shadow: none;) does not remove the shadow styling either.
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I'm using .scss files.
I'm using Sketch v3.6.1, and CSSketch v1.1, OSX 10.11.1