about 8 hours ago - MrFreake_PDX - Direct link
If the game is crashing on startup, it's likely the launcher has forgotten your video settings. In the launcher, go to settings, graphics, and choose borderless fullscreen or windowed mode (the opposite from what it currently is) and see if that resolves it.

There also have been several reports of crashing issues that feature mods not deactivating correctly.

To resolve this:
Go to your Steam Profile, Workshop items, and click unsubscribe from all:

We also recommend clearing your downloaded Steam workshop items, you can find the default install locations here:
C:\Program Files (x86)\Steam\steamapps\workshop\content\281990
and here:
C:\Users\USERNAME\Documents\Paradox Interactive\Stellaris\mod

Hope this helps!