Maybe I just need to reinstall. My projects are on the last HDD I bought about 4 months ago. It should be fine. As for the sticking to one version thing, we are planning on it. But we are waiting for the new animation system to be put in. As far as I know I can’t build that from source yet.
I thought it was the derived datacache for along time, because I have had all kinds of issues with that beast. But there is plenty of space. So I am really scratching my head. It seems these problems started around 4.14 or so and I have reinstalled the engine about 3 times since then.
On one occasion it seemed to clear out whatever was going wrong. But since then it hasn’t. I did have versions from 4.10 up installed so I removed everything accept 4.15 to current.
What I think is the real issue is when I add assets from the marketplace. I go through the directories and select all off them to and move the mouse to cache them all. Like I mentioned before, this use to not happen. I could place an item in the map and it would be untextured while the shaders and materials loaded. Now that doesn’t happen. So when I do this to the mats separately from the models this is when the huge time drains happen.