Fixes & improvements:
- Fixed errors when adding files using an app shortcut, command line, or using "Open with" (Windows only).
- Fixed handling of files with long names. #81
- Saved files that have not been converted to a different file type will preserve their extension, unmodified (no more .jpeg -> .jpg).
- User preferences and temp files are now removed on uninstall (Windows only).
- Updated dependencies.
- Adjusted styling, slightly.