PhpStorm reset evaluation license/period
Make sure to export/import your settings through File -> Manage IDE settings before/after

Windows 10
Close PHPStorm
Run these in PowerShell to remove PhpStorm configuration:
Remove-Item '.\AppData\Local\Jetbrains\PhpStorm*'
Remove-Item '.\AppData\Roaming\Jetbrains\PhpStorm*'
 Save
Go to your registry editors' path: Computer\HKEY_CURRENT_USER\SOFTWARE\JavaSoft\Prefs\jetbrains\phpstorm
Remove all inner folders.
Relaunch PHPStorm