Hi joe35car,
The issue is, I decided to add a new line for 'credits', that's prompted to the console when you lauch GM, and it turns out that many frontends are picking the version of MAME from a fixed position in the text that MAME prompts so I screwed this unfortunately. This was new in this version, and is going to get fixed for the next release. If you have compiling skills you can fix it yourself, otherwise please wait for the next release. There's at least one release per official MAME version, sometimes more in between if important 'u' intermediate updates are released and we have time for that.