How To Upgrade Or Downgrade An Unreal Engine Project Version

Hey guys, in today's video I'm going to be showing you how to upgrade or downgrade your Unreal Engine projects. For example, taking a project from 5.0 to 5.1, or 5.1 to 5.0.
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Unreal Engine 4 Tutorials Playlist: • Unreal Engine 4 Tutorials
Unreal Engine 5 Tutorials Playlist: • Unreal Engine 5 Tutorials
The Basics Of Nodes Playlist: • The Basics Of Nodes In...
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[@PatrickTheDM]

Backup, backup, backup. Losing the whole project is always my biggest fear.

[@kenalpha3]

What is the exact meaning of a complete "project" "backup," no one ever says that. I.e. what all is required for UE to preserve a "project"? E.g. do we really need to copy the complete folder that the project is in? (Content, Config, etc folders?)

[@PatrickTheDM]

@@kenalpha3 Yes, I do the whole folder of the project.

[@kenalpha3]

@@PatrickTheDM Thanks. I have a 90gb project. Some of the folders inside Content are packs I dont use (testing). Thus for me to backup my "project" (the parts I use) - can I merely copy all folders in the project, except Content. Then manually add a new "Content" folder at the backup DIR, and choose which folders in Content to copy/paste? (As long as assets are not linked (in UE) to another folder in Content that I did not copy/paste, then I should be ok right?)

[@PatrickTheDM]

@@kenalpha3 That sounds like it should work, but UE can be buggy. I've not had to use a back up yet so I still hope the whole folder will work. 😁

[@sonictimm]

​@@kenalpha3 Generally the only folders I back up are the Config and Content folders. Intermediate, Build, and DerivedDataCache can be regenerated.

[@AliziaKaline]

No, you can't downgrade a project as assets can't be downgrade. Just change the version of the project is not enough. You just need to use a versioning system, like git and never update your engine too quickly (ie. NEVER update to the last version. Always wait hotfix and feedback from others).

[@NBCNothingButCrap]

Yes, that true. Ive tried it and open it, some of the asset exist and some are not. The biggest problem is I lost my project's level which is more important than the assets.

[@ciprianstanciu7]

​@@NBCNothingButCrap You can now use my plugin Asset Downgrader to do just that :)

[@loktofeit]

WARNING: This does not work for going to a lower version and will break your project.

[@mjtomsky6387]

is there a way to lower the version?

[@CostiVODS]

do NOT do this, you lose EVERYTHING in your game. There is literally no reason at all to downgrade your project because its not possible to have the same project. You essentially start from scratch. Not sure why this wasn't pointed out in the video, especially since this video is made for beginners who would have no way of knowing that.

[@thatguy2920]

for me im trying to downgrade because unreal updated and changed things yet again so now all the tutorials im trying to follow for 5.3 just don't work anymore.

[@buster5661]

I hate when people give important information at the end of the tutorial, like backing up your files

[@paulewey7457]

Thanks works with my upgrade! Had migrating issues but this will make things easier.

[@vladtheclad]

This way of downgrade will not work every time. You can literally to kill your project and make it unloadable in any engine version. So make the backup in first place!

[@marcogrob3899]

THANK YOU!

[@kirilliakushev2906]

does not work. "Failed to load map!"

[@Cpt.Tripps]

All this does is change the file association. You still can't downgrade the actual assets in your project. The content browser will not display any files saved with a newer engine version. This is perfectly viable to upgrade a project, though

[@kenalpha3]

Why? Did Epic really change how 5.1 assets are written? Very annoying. I paid $$ for 4.27 assets, and they are not respecting that. Some devs are gone, wont update their assets to 5x. So Im stuck in 4.27 for now. I want other assets that are 5x, but there's no way to downgrade them to use in 4.27?

[@AliziaKaline]

​@@kenalpha3 If these assets are 3D models/animations, you can export them into any format supported and reimport them in your project in 4.27. If it's blueprint, animBP, etc... it's impossible. It's very annoying, but they can't really do anything about this. The engine 4.27 don't have what is needed to read files from 5+, as they didn't exist when it was done.

[@kenalpha3]

@@AliziaKaline "If it's blueprint, animBP, etc... it's impossible. It's very annoying" If it's a node that didnt exist in UE4.27, I understand. But back to my question, did they seriously change the language/format of how assets are written? That's crazy. How can Epic have the code/feature to "convert" 4.27 code/project to 5x, but not how to convert backwards? (as long as the same nodes exist) I think Epic is just trying to force the move to 5x. But why cant someone release 4.27.3 bonus pack that merely adds a convert backwards feature? (from 5x to 4.27)

[@realadnoh]

​@@kenalpha3 you can't DOWNgrade! The engine version is written to the binary uasset file. if your editor is >= this version it tries to load it - even if it may fail as there was a change eg in the bp nodes or the core api - but if the version is < it will not even try to do it! Kind of the same works with custom UE compiled builds. so not a luck with these guys also

[@Cpt.Tripps]

@@kenalpha3 it's annoying, but this has nothing to do with UE5. It's how it's always been since 4.1

[@Windermed]

Can i ask how you select a specific UE4 build that was compiled and not downloaded from the Epic Games Store?

[@3dtutorialsandquestions]

UE 5.1 not supports maps of UE 5.2. So you get error then try downgrate in this metod.

[@realadnoh]

It's still not possible to downgrade a project. you are only setting which version of the ue editor is loaded when you double click the uprojekt file. as soon as you re-save a blueprint for example in 5.1 you can't open it anymore in 5.0. ​ The engine version is written to the binary uasset file on save. if your editor is >= this version it tries to load it - even if it may fail as there was a change eg in the bp nodes or the core api - but if the version is < it will not even try to do it! Kind of the same works with custom UE compiled builds. so not a luck with these guys also

[@Ljrccc2009]

Can you make a tutorial on the multi-user editor UE5 while not in the same local area?

[@yohanniwandza]

you saved me ! 😉

[@maytwinmedia]

Hey I really need to upgrade my project is it safer if I want to upgrade then downgrade?

[@5GearsGames]

Can you make a tutorial about how to make a VHS filter and timer? please and thank you

[@francislugo6749]

Hi Matt, thank you for another amazing video. I'd like to request a video on how to prevent collision with other player but keep collisions available with other objects. 😊

[@chernoair7805]

Kinda easy friend. You set up custom collision profiles.

[@kenalpha3]

+1 and can someone explain How to setup Collision (physics) vs Animations (so that the Physics isnt extreme) - in 4.27? Meaning I have a leg sweep animation. When player leg hits, the enemy goes flying up extreme. (Yet with a spin kick, the enemy does not move at all when hit.) I dont want this extreme physics effect. I have an anim montage reaction that plays on the Enemy when hit. Thus I only want a mild/clamped knockback of the Enemy capsule. How do I do this? (The default extreme physics may be a 4.27 issue. So what do I edit to fix this?) Ty

[@moha1691]

Can you please make a tutorial about walking up/down stairs with animation, i searched the whole internet without any result i only found the IK tutorial which is i already know how to make it

[@Djonsing]

How simple it all turns out! And I suffered, I moved folders with projects, reloaded plugins

[@yveseboo5057]

Hello Matt, hope you are doing well. I wonder if it's possible for you to kind of show my plugin in one of your upcoming video? It's available on the epic market place.

[@dinglemaniac1541]

You REALLY should have said that part about messing up the project at the start of the video..

[@thefractaleye]

yeah totally!!!

[@ShadowGame-Gyuri]

Engine Version: 1008 Package Version: 1009. this error tells me what I can do?

[@TheReaper-xl7qp]

but I heared that projects made with newer version can't be opened with older ones

[@Cpt.Tripps]

Projects can, assets can't. Save a file or map with 5.1 and open it with 5.0, the files won't show in the asset browser.

[@kenalpha3]

@@Cpt.Tripps What about loading 5.1 assets in 4.27? And 5.0 in 4.27?

[@khayyamal9207]

Good tutorial but wish you tried it before uploading this video because i and many others in past have tried it, just switching version number doesn't cut it cuz when you try to open up the project in the previous version you'll get an error that says the .uproject file was made with a newer version of the engine and there will he some problems, and guess what is the problem? Literally nothing will load up, no materials no textures no meshes no assets no nothing and it's really frustrating wish epic games made it easier for downgrading cuz there is absolute no reason for us to not be able to especially from 5.1 to 5.0

[@marcogrob3899]

YOU ARE A LIFE SAFER

[@leallan69]

There is no switch UE Version available in Show more options!

[@user-rx4rc3sz4u]

İt doesn't shows the more options

[@souhaibbenchaker4824]

this is sad ☹☹ come on Matt, you're usually my go-to for UE information, always had faith in what you post, but after this i am not sure anymore ... 50% of this is just clickbait, you and me both know downgrading ain't gonna work and it ain't gonna show any assets which will brick the project.

[@muneebhero1159]

I don't understand jam them what's TBD

[@MattAspland]

It will be announced at the start of the the game jam. TBD just means “To Be Determined”

[@muneebhero1159]

When I am waiting please can u tell me know by the way my name is muneeb Khan I have join and I will make car gane

[@aminouled]

Failed to load map

[@kairavmehta4055]

Should've have said the warning first !

[@ledistortioniste2758]

Yeah, i downgraded a project yesterday, lost all of my quest system's BP.. dont know why it happened.. BUT Had few backups! 😂😇

[@johndoe35717]

do a tut on mobile controls plzzzzzz

[@ren-ren-ren-ren-ren]

please take down this tutorial. it doesn't work and misleading.

[@tabbywarrior]

THANK YOU!!!