Install the latest patch of the program at this link.
Painter 2017 Update 1 – PC
http://www.corel.com/akdlm/6763/downloads/Painter/16/Painter2017Update1.exe
Painter 2017 Update 1 – Mac
http://www.corel.com/akdlm/6763/downloads/Painter/16/Painter2017Update1.dmg
Painter 2017 Update 1 – Readme Notes
http://www.painterartist.com/static/ptr/sparkle/2017/readme_update1_en.htm