Will my old 0e PDFs be updated to 1e automatically?

No. We will release a printable pdf conversion kit covering modules for free, however. This will include any stat-block or equipment that has changed in 1e in Dead Planet, A Pound of Flesh, and Gradient Descent. This will be available as a print add-on in Backerkit for $5.

This pamphlet will include a list of all stat blocks in those modules, as well as updated weapons/armor. It works as either a 0e->1e conversion (you can tear off each flap and stick it in your book) or as a catchall Warden's aid that has all the 0e stat blocks in one place so you don't have to flip around.