Help! Product says "sold out", but I can't fix it as Zendrop controls inventory.

[goldengooseeeee]

I'm using Zendrop to import my product and I just added a new variant. I added the SKU and everything, but it pre-set the inventory to zero. When I go to change it, it doesn't let me and says "Zendrop controls availability." 

I see nowhere in Zendrop where I can change inventory number on an imported product.

I really need to fix the sold out issue! Any help appreciated. 🙂