changing particle material shader from asset store

How are you supposed to change material shaders from particle packs without it being overwritten after every update? For every material used, are you supposed to copy the material used and put it in your own folder? But with that solution, any material fixes / changes won't be updated.

 

For particle packs, you normally use prefabs from there as is, but if you need to alter any of them, you make a copy of a prefab in your own folder, then alter it.

 

All my particle prefabs are separate from the prefab in the package, but it seems the material shader changes for everything that references it.

 

Material is not stored within the prefab, it is a separate external object, that's why changes affect everything. You'll need to duplicate that one too and reassign it to the copy. There might be a button for doing that in 1 click, somewhere, though I'm not sure where exactly.