changing all products to the same

Hi,

We have manually added attributes design on all products individually to show the images, because it was the only way to get it to work.

We are not that happy about it anymore though and would likke all products that have the “Vælg farve” attribute to be shown as a dropdown list, which it does when changing it on the specific product to Theme default.

However i was hoping not having to go through 100 products individually to change it, is there a smarter way?

i have tried with the global attributes, but i guess the individually set ones overwrite that?