How to reproduce:
1. Create new project
2. Click on Load neutral base
3. Add shirt "Crop t-shirt A1" (content ID JCC93f1cd9c52aec3640)
4. Click on tab "Appearance"
5. Click on "Outfits"
6. Select Substance Material
7. Select PBR_V1_3MAT
8. Click on Activate Appearance Editor

Issue:
It reverts substance material back to MaterialModifier with almost nothing options

Expected:
It uses substance material PBR_V1_3MAT allowing Dirt, Dust, etc.

Workaround:
copy PBR_V1_3MAT to folder where MaterialModifier is and renamed to MaterialModifier, but on activating editor it removes all original textures.