![Image](http://support-cdn.pixelmator.com/uploads-new/cuf_1649681105_AutoDesk_Alert_Pixelmator_Pro.png)
Since SketchBook is no longer supported by Autodesk, we assume that most users have moved their workflows to other apps and would be fine removing SketchBook, if it fixes these compatibility issues. If you still use SketchBook and would prefer to keep it around, instead of saving Pixelmator Pro files in binary format, we’ll use the package format. However, the package format isn’t natively supported by many cloud storage providers, in which case Pixelmator Pro files are interpreted to be folders. Package files do, however, work perfectly with iCloud.
In short, there are some compatibility issues with the SketchBook app and Pixelmator Pro files — you can remove the app and these should be cleared up, or keep the app, and we’ll save Pixelmator Pro files in package format.
If, after you remove Autodesk SketchBook from your Mac, you still have issues opening files in Pixelmator Pro, feel free to reach out to our support team at support@pixelmator.com.