Open a text file in cygwin's VIM

If you right-click on a .txt file and select "open with" you should be able to click "Browse" and go to C:\cygwin\bin\vim-nox.exe. Then you can click "Always use the selected program to open this kind of file".

However, I prefer to just have a "native" Windows Vim install and use that.

Create cvim.bat file:

@echo off
chdir C:\cygwin\bin
start "" mintty.exe /usr/bin/vim.exe %1

Place it on your PATH and then cvim yourfile.txt or as Heptite has said: right-click on a .txt file and select "open with" you should be able to click "Browse" and go to that cvim.bat. Then you can click "Always use the selected program to open this kind of file".