Mame changed the BGFX shader, if you are using this shader, i recommend you either make a completely New install and set it up to how you like, or change the shader options before running a game, then add the no-nag, if you try running this over an older install with the BGFX shader you may find your screen will be dark and barely visable.
NOTE: This does NOT interfere with the Leader boards at all.
**This removes the nag screen that informs you if a rom doesn't work correctly, or if at all, if you use this no nag, then please do NOT go to the mame support site with issues with games, please only use if you understand that there will be no help from anyone at mamedev as you are using a modified version of mame.
mame.exe - Normal Mame with Nags removed. For Version 0.235 (Note mame no longer carries the 64 in its exe name changed by Devs in 0.229)
It's advisable to download the full 0.235 official pack and install it, then just overwrite the exe with the replacement, this covers any changes the mame devs may have made to the support files.
After you have done this, make sure you copy the folders artwork, ctrlr, cheat, hlsl, ini, folders and the ini files from the root of your original mame folder, and move/copy them to the new install.
make sure in the mame.ini file you have the following set.