Modernize the File Converter icon

First of all, thank you for this excellent application. File Converter is one of those tools that makes everyday Windows usage much more convenient, especially with its Explorer context-menu integration.

I have a small design suggestion: would you consider modernizing the File Converter icon?

The current icon feels a little dated compared with the overall Windows 10/11 visual style. A more modern, minimal icon—perhaps following Microsoft's current Fluent Design style—could make the application feel even more polished and consistent with Windows.

This would be particularly noticeable because the icon appears directly in the Windows Explorer context menu.

Just a small suggestion, but I think it could give the application a nice visual refresh. Thanks again for maintaining this great project!