DONE

Cygwin post-install file format
File type: Various data file
A done file extension is related to post-install file format used by Cygwin. Seems like internal data file.
What is done file?
File type category:
Various data file
Date updated: August 1, 2019
The done file extension is associated with Cygwin, a set of powerful tools to assist developers in migrating applications from UNIX/Linux to the Microsoft Windows platform, developed by Red Hat, Inc.
The done file seems to be used for post-install internal purposes.
How to open done file?
The done files are used for internal purposes of Cygwin.
How to convert done file?
There is no way how to convert done files to other formats.
Suggested software to open done file:
Associated software actions with the done file
Software applications that handle other tasks involving done files:
Cygwin (Microsoft Windows)