v1.9.57

Added: nullSpace now runs as a single instance. Launching it while it's already open brings the existing window to the front instead of starting a second copy, which could overwrite the first one's project data. A minimized window is restored, and if Windows won't allow focus, the taskbar button flashes

Fixed: Files now open through Explorer, exactly like a double-click. Apps such as Photos no longer ask "Is this file from a trusted source?", and paths containing &, ^ or % open correctly