Last week I launched Xevious in MAME but didn't start playing for about 15 minutes. When I did start, there was a "wall" of those spinning mirrors coming at me. I had MANY extra ships and over 800,000 points. After the mirrors killed me, on my next life I was playing "as usual" but every enemy I shot granted me an extra life.
Clearly something went buggy but the problem is the bogus high score was saved by my highscore.dat.
How can I clear that out? I don't see any way to do it in the TAB menu and F2 does not bring up any menus.