If you backed the Kickstarter, I think you should have gotten an email from Backerkit with the itch.io download links? (I didn't learn about Lancer until after the Kickstarter was over so that's just based on what I've heard.)
The data pack for the core book is included alongside the PDF in the Core Book PDF (non-free) itch.io downloads: https://massif-press.itch.io/corebook-pdf
The standalone version of Comp/Con v2 is coming soon; there's a new devlog post mentioning that C/C v1 will be officially deprecated when the v2 standalone app is released: https://massif-press.itch.io/compcon/devlog/133911/data-updates-and-v1x-eol