1. PM 4.5.4 on Windows XP SP3 was installed.
2. Installed PM 4.6.1 - everything fine - context menu (Open in Photo Mechanic...) in Windows Explorer was present.
3. Have seen, that PM 4.5.4 was still there, so deinstalled PM 4.5.4.
4. PM 4.6.1 did not start.
5. Reinstalled 4.6.1.
Now 4.6.1 is working, but the context menu (Open in Photo Mechanic...) in Windows Explorer is gone !!
Please Help
Peter