MCreator not regenerating correctly after update

So I updated my MCreator workspace from 2025.3 to 2026.1 and now everything is kinda broken.

I ran the game directly after the update and I got this error for every block that I have in my mod:
.../init/mod_namespaceModBlockEntities.java:27: error: cannot find symbol public static final DeferredHolder<BlockEntityType<?>, BlockEntityType<InfectionFleshBlockEntity>> INFECTION_FLESH = register("infection_flesh", mod_namespaceModBlocks.INFECTION_FLESH, InfectionFleshBlockEntity::new);
^
symbol: class InfectionFleshBlockEntity
location: class mod_namespaceModBlockEntities

init\mod_namespaceModBlocks.java:40: error: cannot find symbol INFECTION_FLESH = register("infection_flesh", InfectionFleshBlock::new);
^
symbol: class InfectionFleshBlock
location: class mod_namespaceModBlocks

I tried fixing it by restoring files from a backup.

But now when I run the game, all my blocks show up as purple/black missing textures.
The console shows this: 

Missing model for variant: 'Block{mod_namespace:infection_flesh}'
No model loaded for default item model ID mod_namespace:infection_flesh

Also, whenever I click “Regenerate code and build”, MCreator just deletes the files I manually restored (models, textures, etc.) and the problem comes back again.

Not sure if theres any fix other than downgrading again.