Even me Robbbert I did everything to make it work but nothing happened I've tried to download afresh one without adding any extra files or folders on it and nothing happen then I've download MAMEUI64 0.165 and MAMEUI32 0.165 and they worked fine except the version 0.166 and 0.167. I have double checked the problem on other PC and it has the same problem.
I will wait for MAMEUI 0.168 and to check if it will work or not.