Update: Publisher is now giving away a free CSP brush set, and you can win a one-year license for CSP. Visit this link with proof of book purchase to claim.

It seems that the Windows version of Medibang Paint will no longer be free.

The link on their website now points to Microsoft Windows store where the app is sold for USD 50.

The older version 29.1 for Windows and Mac is still availble for download, but that's gonna be the last free version.