Add files to .gitignore directly from git shell

Make sure your echo did not add a trailing space:

echo 'token.mat'>>.gitignore

That way, the .gitignore should work.

Also, 2.5 is ancient: unzip the latest Git, as in PortableGit-2.14.1-64-bit.7z.exe, anywhere you want, add it to your %PATH%, and check again.