Rhino 6 crashes with Flamingo 5.5


My rhino 6 has been crashing often especially when i try to render with flamingo 5.5. I have checked the updates for flamingo and everything seems to be updated. What can I do, I use 3D models for work and need rhino to be faster. I have tried to not use the rendering and rhino modeling still is very slowwwww.

Please help