Or, fall back on old command shell, even WinXP one, where you can x:\blah\addons> ren ULib "ulib"
Should work for you. Did for me in testing.
Though a real OS is usually the preferred way, linux doesn't yet cut it Windows DX9,10 level gfx wise, and, well, Apple's bloated version of linux is just too expensive.
M$ has DX. Love hating them for that.