If you get an error now, you likely didn't add any proper ROMs or you need to read the Important Notes at the top.
Once extracted, we would recommend going to the C:\MAX 2.10\Frontend\ folder and right-clicking on both Maximus Arcade.exe and Preferences.exe and choosing 'S end To' > 'Desktop (create shortcut)' which will do just that.
Maximus Arcade is a commercial Frontend software that allows for seamless interaction with multiple arcade and console emulators while keeping the Windows environment hidden. Solution home Classic Gaming & Emulations Guides Frontends Maximus Arcade Frontend and the X-Arcade