I have feature which is not correctly installed on my website. How can I uninstall it without Feature.xml file and without feature id?
Rather not. :D
The answer is here:
http://www.gilham.org/Blog/Lists/Posts/Post.aspx?List=aab85845-88d2-4091-8088-a6bbce0a4304&ID=229
Firstly run the WssAnalyzeFeatures tool. Next it will produce output file named: ContentDeploymentFeatures.txt. Take appropriate feature id and run stsadm commands: deactivate and uninstall feature with id and force option.
And it's done! :D