It's adding tighter SkyDrive integration that lets users attach files directly from their SkyDrive accounts, including optimized photo attachments.

ENGADGET

With the support of Files you will be able to attach files to a task and share with your colleagues, for improved collaboration outside of just the to-dos.

ENGADGET: Wunderlist Pro goes live for iOS, Mac and web, priced at $50 per year (video)