Audacity 3.0.0 replaces .aup with a new .aup3 file format that holds everything in a project including your audio files. That means .aup3 files will be much larger than .aup files.

In 2018, Microsoft open-sourced the original and first GUI-based Windows File Manager which debuted in Windows 3.0. The program, which is maintained on GitHub by Microsoft, is now available to ...

Wittenberg copied File Manager from Windows NT 4.0 source in November 2007 and has made a "very limited set of modifications" to enable File Manager, also known as WinFile.exe, to run on Windows 10.

The files are created by Microsoft XPS Document Writer, but can be opened by Microsoft XPS Viewer. You may access the Viewer directly, or open it through the file.

Microsoft has released the source code for the original, 1990s-era File Manager that is so familiar to all of us who were dragging and dropping on Windows 3.0.