Processor and memory overload causing instability in latest version of XD (45.0.62)

Seems that this issue is back again after the latest update XD v 45.0.62

Loading a cloud document kills my machine, when working on a cloud document my pc dies during auto save. If I work on a local document the application is just really buggy with freezes and crashes, usually around the point where the document is saved.

Previous version was fine. Although I can't roll back to it because my latest cloud documents won't open in it.