JoeViking245

It will only delete (remove) the "GAMES from your [LaunchBox] collection".  "Collection" being the games you have installed in LaunchBox. (I guess that can still sound confusing. )
It will not delete the ROMs from your computer.  UNLESS you check the box under Tools - Options, "Allow deleting ROMs when deleting games". This is un-checked by default.  Also, if it were checked and you went to delete a game or platform, a 2nd popup message will show:

The database is back up and running now.

Auto-Import works when new ROMs are added to the respective Games/platform_name folder.
Not only does it work for finding new games added to your existing platforms, if you place ROMs into a /Games/ subfolder for a platform you haven't added to your collection yet, it will import those as well.
LaunchBox adding the subfolders [for you] helps to ensure the [new] platforms are named correctly which, coincidence or not, also ensures proper scraping.
aka, with Auto-Import enabled, place your ROMs in their respective Games subfolder(s), LaunchBox makes magic happen.
Read all about it here:  Automated ROM Imports - LaunchBox

Fixed(ish).
Close LaunchBox Navigate to you /LaunchBox/Plugins/ folder Delete the following folders: Dolphin LaunchBox Integration PCSX2 LaunchBox Integration RetroArch LaunchBox Integration (Re)start LaunchBox

Tools < Import < Manually Add Game...
Ctrl+N
Right-click anywhere in the main (middle) section and select Add
Tools < Import < ROM Files < Single Platform, then select Add Files and navigate to the file.

Again, it's not an incorrect number.  It's merely a 'different' number.  To help with your endeavors, try this.  Hint: use the "incorrect" number.
https://gamesdb.launchbox-app.com/games/dbid/4538

In the emulators Running Script section, add to the beginning of it
WinWaitActive ahk_exe snes9x.exe send !{Enter}  
As for mgba, I've never used that emulator.

Pretty sure you can rule out the animation effect of the Disc images.  That's a fairly basic WPF storyboard animation.  May look impressive in code. But is essentially as simple for WPF to do as it is for it place text on the screen.  You could comment out those 2 lines in the 2 files having them and test from there.
But if you're seeing the same issue in BB between all WheelxGamesView views (e.g. You see it using Wheel2 and also when using Wheel4), that will rule out the animation being an issue.
 
To supplement the extensive testing you've done thus far, grab an N64 reference video, make copies of it matching the filenames of your Steam videos.  Move you original Steam videos to somewhere safe and place the 'copies' in their place.
Yeah, in this test, all Steam games' videos will "be the same video". But each game is accessing/loading a separate "file".  Hope that makes sense.
This should rule out or confirm that the Steam videos, original, converted, trimmed or otherwise are the underlying issue.  Which you may have deduced already and be a moot test.

Ok. So a whole different folder location. That's good.  Did you transfer the /LaunchBox/Core/ folder?  That would cause an issue.
May try only copying:
Data Games Emulators (if it's there) Images Videos Actually, you could just copy the entire contents of C:\username\LaunchBox\ into [an empty] C:\LaunchBox\.  Then run the 13.17 installer and point it to C:\ (as the installer will make it C:\LaunchBox\).  Double check updates are off. Exit LaunchBox. Delete the contents of the /Updates/ folder and "call it a day".
 
And it never said 'a new update has been downloaded, would you like to install it now'?  (Assuming it did) Even if you clicked No, at that point it will install it next time you open it.
If that message popup never showed, check and double check that you're actually starting the exe located in C:\LaunchBox\.

To help determine what's going on, in LaunchBox can you share some screenshots:
- edit your emulator (in LaunchBox) and share a screenshot of
     - the Details section
     - and the Associated Platforms section.
- edit [just] one of the games not launching from LB and share a screenshot of
     - Launching section

When importing a platform (or updating metadata and media) and selecting to add bezels, LaunchBox downloads the Bezel Project files and then places the bezels for [only] the games being imported, into their appropriate folder.  e.g. for MAME, they get placed in your /MAME/artwork folder.  Myself, I don't use them for the RetroArch systems I have. But imagine they go in something like /RetroArch/Overlays/../../  But that's just a guess (for RA).
So the temp folder/files is just that.  A temporary download to then "cherry pick" just the ones for your games being imported/updated.
 
Assuming 'your' best option is getting them from EmuMovies (which is the best option), the only other option I'm aware of is
Scour the internet for them (time consuming and most likely, a fruitless adventure) Look in the Downloads section (here on the Forums) Create your own

Oh, it's a Steam game?  What its Steam ID #?  (In the games Launching section, the Application Path should by something like "steam://rungameid/21130".)
Continuing with these Q&A's will help determine what's-going-on, why-it's-happening (hopefully) and give the developers and idea how-to-fix-it for this situation so other don't come across this in the future.
 
 
If you just want to do a brute force fix-the-dang-thing...
Save it with the game that's found Resident Evil 4 (2005) and the LBDB ID # showing as 7801 Exit LaunchBox In Windows Explorer Navigate to /LaunchBox/Data/Platforms/ Open Windows.xml using any text editor Search for <DatabaseID>7801</DatabaseID> Replace 7801 with 261464 <DatabaseID>261464</DatabaseID> Save and close the file Open LaunchBox Select [only] your Resident Evil 4 (2005) game Tools - Download - Update Metadata and Media for Selected Games When asked "Would you like to update games with existing metadata and/or media?" Select "Yes, download and replace all existing metadata and media" (the 1st option) Click finish to "grab the correct games data" Now you can
Edit the game Go to the Alternate Names section Select "Resident Evil 4: Remake" Click "Set Selected Name as Title" Click OK to save and close

LaunchBox does not dictate the controls used inside the emulator.  That's between you and your emulator.  But it does pass command-line parameters. Which is why I thought 'maybe' that could be causing the issue.
 
Test:  In LaunchBox, right-click a game and select Open MAME.  From within [standalone] MAME that opens up, load "the game" and check if P1B2 is working as it should.
If it's not working, [in LaunchBox] edit your MAME emulator and make absolutely sure that the mame.exe you're pointing to is the exact same one you were testing on, outside of LaunchBox.  This is actually an [unfortunate] common occurrence. But an easy fix.
If in that Test it is working, I'm not sure what to tell you.

Check in Controller Mappings.  System Menu < Options < Controller Mappings (or Keyboard Mappings if your encoder is set to keyboard mode).
Check what's mapped to "Exit". "Exit" closes Big Box.  Clear it (best option) or change it to something else.  Hopefully that helps,

Myself, I keep all LaunchBox images (that I want to store) checked. Then in the EmuMovies tab, select only the media that is not available from the LaunchBox Games Database.  Which leaves you with Manuals and Videos.

Depends on the error you received.  If it was something like "can't from the ROM.."
You have (at least) 2 options:
Open LaunchBox Select the platform Select all games in that platform (select one and then press Ctrl+A) Go to  Tools < File Management < Change ROMs Folder Path for Selected Games... Read and follow the Prompts With LaunchBox not running Edit the platforms file you changed the game's ROMs location e.g. E:\LaunchBox\Data\Platforms\Nintendo 64.xml Do a bulk Find & Replace Find: E:\LaunchBox\Games\ Replace with: C:\LaunchBox\Games\  

The Full Set link on PD Git is actually a "magnet" that will attempt to redirect the download to your installed torrent client (downloader) app.  Many people use qBittorrent.  Not familiar with the one you mentioned.  You will be asked to click OK to have it direct the torrent to you client.
You client will download the plethora of .zip files into the folder you tell it to.  When 100% done, close your client then either keep that folder of ROMs (zip files) where it's at or move it to wherever you want.
Then in the Import MAME Arcade Full Set Wizard, Browse to that folder containing the ROMs your client downloaded for you.  (For reference, the non-merged set should contain close to 42,000 zip files)

In short...
 
Well, only "reasonable" option.  I suppose you could customize your theme and force it to look in a specific folder (name of your choosing) for the game image file(s).  Viable. But not very reasonable (depending on the severity of your OCD-ness).
 
Plan "B", create your folder "3D Boxes - GH" and put your images in it.  Then create symlinks to those images in e.g. "Arcade-Flyer".  They'd be stored where 'you want them', but you'd still have to "classify" them as "Arcade-Flyer" in LaunchBox.  So not really a 'good' plan.  

Did some hands-on testing and learned a few things...
Using -c (scummvm.ini):
If you start ScummVM without "scummvm.ini" in the same folder as the exe, it will be created in %AppData%.  And save states etc. will be saved there as well. If you use the -c parameter (or --config= ), regardless of what you set it to, Saves will be saved into the %AppData% folder.  Unless you use the --savepath= parameter as well.  Same with --logfile= and anything else that gets saved to disc. If you start ScummVM with "scummvm.ini" in the same folder as the exe, and no -c parameter, everything gets saved in a "portable" fashion.  
Using -p:
When launching a game with the -p parameter, ScummVM will see it as a "new game" but still identify it (monkey2) correctly.  But it will then suffix the "new games" id with -1.  And since the scummvm.ini file doesn't contain a specific section for "[monkey2-1]", no custom settings you originally made will load.  This 'suffix thing' is the same with save states.  
If you manually edit the scummvm.ini and copy/paste the [monkey2] section and rename it [monkey2-1], upon launching with -p, ScummVM will again, find a "new game". This time suffixing it with -2.  ...We call this an uphill battle.
 
The Fix:
I tried this, that and the other thing to be able to load the saved game-specific settings and nothing worked.  Except 1.
Open ScummVM Select the game you made specific changes to (Monkey Island 2) Click Game Options Make note of the ID (monkey2) Close ScummVM In LaunchBox, edit the game In the Emulation section check the box Use Custom Command-line Parameters In the space below it, put -f monkey2 %noromfile% (if you prefer, you can change -f to --fullscreen.  Same thing.) Click OK to save and close Wash, rinse and repeat for other games you've made custom settings for Play games  
Final Note:
With that, you can revert the emulators Default Command-Line Parameters to -p %romfile% --auto-detect --fullscreen.  (removing the -c config parameter)

Feedback - LaunchBox - Steam Trailers Unavailable Due to New Steam API Changes

The LaunchBox Strategy Guide 
 
The main YouTube page can be difficult to navigate though.  To me, the Tutorials page is a little easier to at least be able to scroll through.
 
When looking for something specific (here on the Forums), I find the Search (top of the page) results are hit or miss. Weighing heavy on the miss side.  So if what I'm after is not in the Strategy Guide or is a unique asking, Googling "LaunchBox I need info about xyz" usually works pretty well.

Depends on the platform.  MAME (and a couple others) aside, ROMs are typically named after the games Title.  For MAME (Arcade), LaunchBox will parse the xml result from mame.exe -listsml to "convert" the ROM name to the games' Title.
I didn't realize Daphne had its own set of ROMs.  I've only ever used Hypseus Singe for LD games, which uses MAME ROMs (and can be scraped as Arcade).  You can watch a tutorial here.
Provided Daphne has an accessible means of "translating" ROM name to game Titles (e.g. the -listxml parameter or a definitive source), you might want to put in a feature request (top of this page under Help & Support) to add it as a Scrape-As value.

Stick with the default Image Group Boxes and download Advertisement Flyer-Front images.

Edit the game and in the Start/Pause section
check Override click Customize check Enable Game Startup Screen un-check Enable Game Shutdown Screen Click OK, OK To edit your Windows games in bulk
select all the Windows games press Ctrl+E (to start the bulk edit wizard) for the Field, select Startup Screen - Shutdown Enabled leave the Value un-checked click Next, Next  if you want to still have the Startup Screens enabled Select Yes for the Field, select Startup Screen - Enabled check the Value box click Next, Next  Select No Otherwise (for no Startup or Shutdown screens) Select No  

The "marques" on the left are Clear Logos.  When a Clear Logo (image) for a game doesn't exist, it will show as white text.
So the correct metadata Media you need to download for the game is Clear Logos.  Once you've done that (from LaunchBox), in Big Box, you may need to go to System Menu < Options < Image Cache < Refresh Game Wheel Images to have them appear.