- remove unused file - register DLL file to view thumbnails in Windows explorer (if the user has admin permissions) - some code simplifications
- fix bug that registry uninstaller settings of the previous version are not replaced when installing new version of the same series - avoid explicit calls of the name "FreeCAD" - update example code and description to MSVC 2017 and FreeCAD 0.19git
Found via `codespell`
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