I was working with my webstorm 7.0.3 which used for editing the javascript code. All of the sudden something went wrong with my system and everything froze! Had to cold reboot the system and when restarted the webstorm i saw these error messages stating that none of my settings that I spent hours to create ( and of course saved) can be restored!
This is has may be a serious bug in websotrm which may cause lack of reliability of this product
There is a hidden folder .idea inside the webstorm working directory. Remove that folder and try again.
maybe late, but this just happened to me on PhpStorm2018.3 upgrade.
one can just reclaim ownership on files inside .idea directory and change the read-only attribute on all files inside .idea.
for linux:
sudo chown -R user:group .idea inside a project dir (root dir where .idea resides)
and then
chmod +r -R .idea also inside a root dir of the project
来源：https://stackoverflow.com/questions/20961240/webstorm-crashes-and-all-my-settings-gone