Usually when you sell the source to somebody they take the project over they tend to make up their own rules. I provided a working tool, and IS still working to this day when I initially sold the product.
Never had I provided a non-working tool to any of my customers. The Lifetime key you bought is for v1, as that's the tool that I was selling.
You still and will always have access to v1 of the tool, as to that's what I SOLD, not the person who bought the code from me.