If Google Chrome crashed and refused to open no matter what you do, check the Programs and Features section under the Control Panel to see if the Google Chrome is still installed. If Google Chrome no longer listed in the Programs and Features section, you will unfortunately have to reinstall Google Chrome once again. If you are the only user of the computer and you installed the software personally, check your downloads folder for a copy of the installer file. If no copy is there as you selected RUN instead of SAVE, then you will need to download it once again from Google’s servers.
From what I have seen, your Google Chrome settings will be intact and if you were already signed into Google Chrome, you will be automatically logged in again once it is reinstalled.