Dynamo Keeps on Crashing and also Crashes Revit

Dynamo version 0.9.0 keeps on crashing. It started when I kept on getting errors about ‘dereferencing a pointer’. I am also using the Rhynamo project extensively. Crashes as soon as I import a rhino models and it struggles to import the geometry. Worked fine earlier in the day. Just freeses up and can’t get a preview of any geometry in the graphical window, and the node strings start to behave strangely and disappearing. Shame, as it was working so well.