- replaced misuse of "FileLoadException" with a custom LoaderException to handle file loading issues with better continue/fail logic
- removed "Save As" and replaced it with "Convert list" menu item that shows information on how to use a reference list instead of direct conversion
- included latest translation to Polish (thanks to J.D.)
- reorganized File menu and tool bar
- allow renaming channels in SatcoDX channel lists (\*.sdx)
- improved support for Panasonic LS 500 / LX 700 series