OS: macOS 10.12.6 64bit
XnView crashes after switching from fullscreen view. Also it crashes when you returning to FS view by ALT+TAB.
Effect:Program crashes
To reproduce:
1. Open XnView;
2. Open any image in FS;
3. browse several images in FS view;
4. ALT+TAB from FS view; Also it crashes when you press ESC in fullscreen view to return to Thumbnail view.
Actual behaviour (bug): Crash

Expected behaviour: No crash. Check logs.