I’m running PanoramaX (current version) under El Capitan (V 10.11.6).
Here’s a strange thing: I have a dock menu for all my DB stuff, including PanX files. The first time I open a PanX file from the dock menu after startup, all is fine – but the second time, instead of launching PanX and opening the file, the Finder acts as if I had asked to look “inside” the file at its (normally invisible) internal subfiles: data.archive, data.plist, forms.archive etc., 8 files in all.
To launch, I have to open PanX and use the Open command in the File menu.
If I reboot, the file will again open OK from the dock.
What I can’t figger out is: how can PanX influence Finder behavior?
Panorama cannot influence Finder behavior. What you are describing is something going on with your Finder or Dock, Panorama isn’t even involved at that point. I have never heard of a problem like that, but maybe you need to reinstall OS X itself.
If you have your Panorama X icon in the dock all you have to do is click and hold the icon and a list of recent Panorama files will popup. Select the file you want and Panorama will open with that file active.