Can't launch editor 4.4.3 (Ui module failing)

Hi Tim, thx for looking into this.

Concerning your questions:

  1. Yes, I have installed the preview 4.5 after i installed 4.4.3
    Preview works, 4.4.3 does not.
  2. I am using the Launchers binary’s .
    I am completely new and do not know yet, how to use the Github.
  3. That is clear to me, I am learning the engine following the video tuts and wanted to repeat the lessons with my own created assets exported from Blender.
    It was accidently that i exported not 1 asset but all the assets from my blender scenery. It was not usable anyway because i had Vertex painted assets in it and the original materials and textures where switched off.

I have been able to import assets one by one from Blender into 4.5

In the meantime I have also installed the binaries 4.3.1 and 4.2.1
Both not working.

Error on 4.4.3
!Id:6568e51e9be8a2773e8a49071fa0789b

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: ModuleManager.IsModuleLoaded(ModuleName) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.4\Engine\Source\Runtime\Core\Public\Modules\ModuleManager.h] [Line: 283]
Tried to get module interface for unloaded module: 'MeshUti

Error on 4.3.1
!Id:6568e51e9be8a2773e8a49071fa0789b

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: ModuleManager.IsModuleLoaded(ModuleName) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.3\Engine\Source\Runtime\Core\Public\Modules\ModuleManager.h] [Line: 260]
Tried to get module interface for unloaded module: 'MeshUti

Error on 4.2.1 (DIFFERENT!)
!Id:6568e51e9be8a2773e8a49071fa0789b

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: ModuleInfo->Module.IsValid() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.2\Engine\Source\Runtime\Core\Private\Modules\ModuleManager.cpp] [Line: 609]
Tried to use invalid module …//…//…//Engine//Binaries//Win64//UE4Editor

…and yes 4.5 works fine!