I did mistake for recognizing *.volt file type as XML. It's supposed to Twig file types. I've read on many sources just like opening menu on "Settings->Editor->File Types". I can't find any "File Types" menu in this version nor the plus button to add another file types. What must I do then? I know this is a silly question, but still make me frustated. Thanks
Soft solution:
Open Settings->Editor->File Types
go to XML
and find *.volt
there. Then just remove it.
Hard solution: navigate to .Webide100/config
directory and find file with content volt
. Probably it will be XML file. Then you can remove extention and restart phpstorm.