I just updated my solidworks from 2017 to 2018. Uninstalled 2017 and then installed 2018. When I try to open a part file nothing appears after the part has loaded. I can see the tree and when I mouse over the screen the mouse acts like there is a part there. It will select edges and features. I've already tried uninstalling and reinstalling again and same issue. Ive tried opening files that were last saved in 2017 and files that were recently saved in 2018, also when you try to create a new part the sketch is not visable, you can only see what the image shows below.