First, I'm sorry if someone finds the topic where I have found the solution last year, but having spent the past few hours searching the forum and Googling, I'm questioning my memory (and sanity) regarding an earlier solution...

When I was running v1.39, my client asked that I adjust the store so that when a customer adds a product to their cart and must choose an Option (in this case, packaging/size/weight), the customer isn't shown the modifiers (+15 price, +25 weight as an example) for that attribute.

And, of course, when I upgraded, I didn't catch the particular customization, so here I am, hoping someone can point me in the right direction...