It's very straightforward. Just go to "Settings / Integrations" to enable and link with your Dropbox or Google Drive account.
Like this:
You're done. WaiverForever will sync monthly archives ( pdf or zip files) to Dropbox or Google Drive for you.
There will be a folder named "archived_pdfs" under "WaiverForever" in your Dropbox's Apps folder. For Google Drive, It' called "WaiverForever_Archives".
Here are two examples:
