John IV has decided to move on from emulation, as per his post:
https://www.mameworld.info/ubbthreads/showflat.php?Cat=&Number=398948&page=0&view=collapsed
The mameui.info site has already gone down and won't be back.
Future versions of mameui will be available from my site https://messui.1emulation.com
As per John's thread, there's a link to the latest IV/Play frontend there.
Please adjust your bookmarks.
Thank you.