I've changed from Git to SVN the folders which contains the project's code, but Intelli开发者_运维技巧J seems the same as before so I can't work with SVN
Ctrl+Alt+S (Project Settings) -> Version Control
It should list the project directory and what VCS it's using. Change it there.
Here is a nice document regarding the issues with several Version Control Systems:
IntelliJ Site
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