Krita 5.2.6 fixes a critical error with pass-through group layers (https://bugs.kde.org/show_bug.cgi?id=493774).
Download Windows If you're using the portable zip files, just open the zip file in Explorer and drag the folder somewhere convenient, then double-click on the Krita icon in the folder. This will not impact an installed version of Krita, though it will share your settings and custom resources with your regular installed version of Krita. For reporting crashes, also get the debug symbols folder.