I was really not sure if I should make this a bug report or normal post, but here we go.
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The designers have confirmed a couple of months ago, that you are supposed to add Fusions to Solarian Crystals (without them it would be rather hard to deal with DR and incorporeal creatures). The info hasn't made it into a FAQ yet, but maybe they assume that it is not necessary since they are listed under weapons.
Could this functionality be added to HeroLab Online?
Owen confirms it on the first page of this thread (post 50)
http://paizo.com/threads/rzs2ukv9&pa...olarian-Weapon