Remember to install .zip & .tar.gz versions into COMPLETELY EMPTY FOLDER. Do not just unpack over a previous installation!
You'll need to BACKUP and ERASE your SETTINGS first before run when changing your build DOWN (the ~/WebStorm folders in you home dir + .idea folder in each project)
Initial release date: March, 20 2017
Latest version: WebStorm 2017.1.4 (build 171.4694.29, built on June, 07 2017)
Initial release date: November, 14 2016
Latest version: WebStorm 2016.3.5 6 (build 163.15188.815, built on March, 17 2017)
Initial release date: July, 11 2016
Latest version: WebStorm 2016.2.4 (build 162.2228, built on October, 19 2016)