This build has everything that alpha build 7542 had, as well as some more bug fixes and tweaks.    To get this update, make sure you have "Also check for pre-release (beta) versions" enabled in Settings, and then click on the Check Now button. (Unfortunately alpha/beta releases are not currently available for the Microsoft Store version of the app).  You can also download and install this build directly: https://www.getpaint.net/files/zip/test/paint.net.4.214.7547.1159.install.z