Hey, I have noticed that with each 'undo' used the viewport becomes increasingly slower even though there is nothing in the scene.

When you close the scatterfx plugin it returns to normal speed.

Also, when I close the plugin and re open to solve the slowdown option the plugin becomes unsusable giving errors when trying to select new base objects etc.

The only way to solve the slowdown if you make a mistake is to shutdown max and restart, very annoying.

Cheers