Drawing area freezing - Draftsight 2019

I am having issues with this release and the one before (SP0). 

The drawing area does not seem to refresh /freezes when i zoom out or pan or click on an element. 

I have tried:

- updating my graphics driver

- reinstalling DS but no luck.

- adjust GPU settings on windows (using Intel app)

- recovering drawing

- resetting profile

I am running windows on a 2015 Macbook Pro (from Bootcamp). 

If anyone can help tat would be much appreciated.

Thanks