Lost my Lightroom preset

I have been using Lightroom successfully for at least 3 to 4 years now with my favorite preset on it. I updated the Lightroom for my subscription has advised, and I completely lost it and can't find where my preset is. I use it on absolutely everything and I really need to find it. Please help. I don't see any solution in your forum .,

it says I have no prior purchases when I try to reset purchases