I hope you did save all your projects :-).
Could you please delete the following files:
C:\Users\kae\AppData\Roaming\ --> ThingworxStudio folder
Then reinstall via the link given or https://studio-download.vuforia.io/downloads/ThingworxMobileBuilderApp.application
John Buchalo Usually this might be due to one of the ports (3000/4000) already being used, or else any pre-installed node.js application. If possible, can you please reboot your computer and retry installing Studio?