I've found that on every version of Krita I use (dating back at least since 3.0), I can only open files by first opening Krita, then going to File>Open. If I try the other way, ie. double clicking on a .kra file, or right-click>Open With>Krita, Krita will start up, but the file doesn't open. However if Krita is already open and I double-click/right-click>open a file, the file will appear. Steps to Reproduce: - Make sure Krita isn't already open - Double-click on a .kra file, or right click>Open With>Krita on compatible image files
*** This bug has been marked as a duplicate of bug 370320 ***