At the commandline, run this:
kpsewhich --var=TEXMFLOCAL
It will give you a directory, such as <html>C:\texlive\texmf-local</html>. On that path you will find <html>\fonts\truetype\public</html> This is where you put your fonts (you can use subfolders if you want to).
texhash
\newfontface\MyFont{MyFont} %or, to use it in just one place \begin{center}\MyFont\huge{The Score Title}\end{center}
To update a font, you do the same thing you would if you want to add a font, except that you *first* have to erase lulatex's font cache, so you would do this:
luaotfload-tool --cache=erase texhash
Running the <html>luaotfload-tool –cache=erase</html> command will erase the cache located at <html>C:\texlive\2013\texmf-var\luatex-cache\</html>. But don't worry, the next time you compile a tex file, lualatex will rebuid the cache automatically.