I would always heat the soup. Solubility of DMT in naphtha is actually pretty low at room temperature. Worst that can happen is you get more yellow spice. But after sitting for 1 year you probably will anyways not get totally white stuff (not a problem).
If you left it like this maybe also some DMT has even crystallized at the bottom of the glass, so better to indeed heat it up and shake again, to make sure everything gets into the naphtha.
What I dont understand: after 1 year should not all the naphtha have evaporated even if your glasware was closed?
Anyways naphtha is cheap so I would always do another pull and see. Nothing to loose!