In 0.5.2 the app could close completely when you attached an image to the AI chat — whether by pasting from the clipboard, picking a file, or capturing a screen region. The cause has been found and fixed.
The chat windows are now also hardened by design: an internal error inside them can no longer bring the whole app (and the tray icon) down with it.
What to do: update to 0.5.3. The installer updates your existing copy in place — settings, dictionaries and licence are kept, and there is no need to uninstall the old version.
Sorry for the trouble: the bug shipped in 0.5.2 and affected all three ways of attaching an image.