Sonic Arcade Game Missing

Hello,

I have been using MAME for years, and the last build that I had was around
..75. In that version, I played the unreleased Sonic Arcade game. I
recently updated to1.something and was delighted to find out that the newer
version of MAME plays about 1,500 more titles than my previous version.
However, when I went to play Sonic Arcade, it was no longer listed. Was the
name changed, or have some games been removed while new ones have been
added, or have I just done something stupid?

Thanks in advance for your help.

Michael