Behold, the legendary Unity 5.5 to 5.4 downgrader.

Deleted

 

Hopefully people will just be using version control and never reach this thread.

 

Thanks for sharing. Hopefully it's a rare need, but nice to know it's available and possible.

 

Hm... our scenes are actually serialized as text, some of them are even 30MB.

Is there any way to make this tool work on scenes?

 

Thank you for this awesome tool! This downgrader saved my day and a lot of work!
I did face some problems after downgrade though - it's not only mentioned problems with sprites/textures (i had to apply "Mipmap" and "compression" into import settings for the most of the image files, to fix their look), but i also had problem with Unity's native scripts of "Image" and "Button" on prefabs. Unity could not recognize them, so project was broken because of that.
But after analyzing prefab's code (compare working prefab code of Image and Button components with not working) i found that "Image" and "Button" components are referencing to wrong guid. So replacing wrong guid code with correct one fixed the problem and that was the last issue with downgrade in my case.
Hopefully this will be useful for those who will use this tool.

 

I had to rewrite the tool to also handle .unity-files.
I really don't get the argument why not.

 

I have to two halves of a project, one in 5.6 the other is in 5.3.4, will this script also work to downgrade 5.6 to 5.3.4?

 

Wow men, this saved me a lot of work. Thanks.

 

Sharing my own changes:

Changed ...

Code (CSharp):

1.  
2. if (f.EndsWith(".prefab"))
3.     ConvertFrom55To54(f);
4.  

... to:

Code (CSharp):

1.  
2. if (f.EndsWith(".prefab"))
3.     ConvertFrom55To54(f);
4. if (f.EndsWith(".unity"))
5.     ConvertFrom55To54(f);
6.  

Added at the bottom of the loop "called go through each line" ...

Code (CSharp):

1. // Text and Image references
2. if (lines[i].StartsWith("  m_Script: {fileID:")) {
3.     lines[i] = lines[i].Replace("f70555f144d8491a825f0804e09c671c", "f5f67c52d1564df4a8936ccd202a3bd8");
4.     continue;
5. }
6.  

Added after ...

Code (CSharp):

1.  
2. // remove empty material
3. if (lines[i + 14].Contains("- {fileID: 0}"))
4.     lines.RemoveAt(i + 14);
5.  

...

Code (CSharp):

1. if (lines[i + 15].Contains("- {fileID: 0}"))
2.     lines.RemoveAt(i + 15);
3.  

... this is due to a line break in the guid above, pushing the second material item one spot down.

 

Thank you for this tool!
Had to open a 5.5 project I made at home at a lab that have 5.4.

 

Thank you. Note the tool runs fine on OS X, just remove the Console.{Window,Buffer}Width lines.

Attaching steinbitglis patch as unified diff.

 

I stumbled upon this theme.
I have dealt with this issue and just recorded my repair script.

 

Hello, we are trying to downgrade a project from 2018 to 2017. Prefab structure breaks. Is there perhaps a current version of the converter script that could help us fix it? Thank you