Like Dos mentioned in his post you should not need a hack. It can run in 4:3 natively. I would check your emulator.ini and make sure in the line for WideScreenWindow it is set to 0.
When you say "downlaoded a whole bunch of mame roms on LB" do you mean you downloaded roms and imported them yourself into LB or you downloaded one of those prebuilt LaunchBox set-ups some people make?
I would first right click a game an edit it, then in the additional apps tab edit one of the additional rom versions and make sure it is pointing to the correct emulator.
@thimolor Really looking clean. Those platforms look good both in original form and this new version (that little subtle background in the SNES image). I like that you are keeping it simple.
Apologies, I completely forgot I replied to you on this issue. What Mute654 advised is correct. If you imported both games and they show as individual games in LB just select both and right click then combine. During import you can also select the check box to combine games of the same name. So a couple ways.
Also afteer you have combined if you edit that combined game and click on the additional apps tab you can select which of the combined games show up as the default game.
Check your associated platforms tab in LB setup for Retroarch. Make sure it is showing the your SNES platform name as it appears in LB, the correct core is listed, and the core is not showing it is missing.
Well no users have actually requested that be an option so likely something niche enough it will be a while before it becomes an option. Recommend submitting a feature request on our bitbucket so users can vote for it.
The mame full set importer does not import device and bios files. If you leave the default importer check box items ticked when you run it then LB should import around 2800 titles. None of which are bios or device files.
Nothing happens to games when you delete a playlist. They belong to the platform you imported them into. So they stay in the platform. That's what C-Beats was explaining.
The list is in the original 2019 poll thread. Jason has been checking off what he has done. Not sure how up to date it is as I have not worried about it. But it looks pretty up to date. The top 20 on the list I believe are what is being worked on. Jason has mentioned few times already a new poll will not take place until 2019 items are wrapped up.
Try just moving the rom. Since you only have the one NES game just move that to a folder path that does not have any accented characters. Then right click the game and change the rom path. Then try launching.
Combine the roms in Launchbox into one title. Then in either LB and BB you can choose the version. In BB in the game details screen you will see Additional Apps/Version option. Click it and it brings up the different versions.
I will definitely say purchase a license. I have enjoyed the product for over 3 years now and our two devs just keep making it better. I know they would appreciate the support. Should be easy enough to fix what you have and get it a bit cleaner.
I see you did not put the mame roms inside the Mame\Roms folder you embedded one folder more. Which is fine you, but you do need to go into Mame and tell it to now look there. Also I do not see a Mame.ini file. This usually gets generated if you run Mame64.exe and save the current settings. At that point Mame generates the ini file.
Did you tell Mame where to find the roms?
Ok then that is definitely a disconnect in LB settings and has nothing to do with cores or bios files. Since your game play in RA properly.
Can you right click a game for NES and edit. Then share a pic of that full edit screen showing the Launcher tab showing and then same pic with the Emulation tab showing.
Also FYI you do not need to use an image hosting site you can attach them directly to the post.