Hey! Sorry you're running into this. Likely the window is simply offscreen. This happens when display layouts change. An easy way to fix would be to follow these instructions. This may also work however I have not personally tried it: Move offscreen windows back on screen.
You could also open the settings.json file and adjust the window position there, but the above steps should fix it. I'm looking into a better solution for this as on some systems repositioning the window automatically when it was offscreen would cause a hang so I removed that in a previous version.