I'm finally going to get the Morrowind upgrade. I clicked on "buy Morrowind" or whatever on my character selection screen. It brought me to a page to sign it and buy it. I signed in, and now it's asking if I want to buy ESO Plus along with the upgrade - showing several options: 3 months/whatever or none, but I already have ESO Plus (and it's recurring, didn't cancel it).

This probably sounds dumb, but I don't know if selecting "no" would "accidentally" cancel my existing membership, or if selecting a membership plan will renew my current with another charge (which I cannot afford right now so that's a huge problem). not sure if I'm doing this right
thanks