Sketchup pro 2018 not responding unless I reinstall each time I open a file


When it does open correctly are there any splash screens, error messages or other dialogs opening that you need to click away?
When it does open, you could try going to Preferences/Workspace and hit Reset Workspace button.
It sounds to me like something is opening off screen that needs your attention but it is caught between monitors.


this does not say very much because your other application do probably not use the accelerated 3D OpenGL stack of the graphics card driver.

You should check the 3D settings of the nVidia Control Panel (right-click desktop) and ensure that SU is configured to always use the GeForce (sometimes called “high-performance Processor”) and also poke around for 3D settings related to mutiple monitors.