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Now the IDE spends time restoring tabs from previous session when I start it. IDE spends time when I close it to save lists of open tabs to projects. But for me its useless and changes project files almost every time I open the IDE. And I see a bunch of modified files when storing changes to a VCS. So it would be pretty nice to have an option to disable that feature.
The problem was with file permissions in netbeans configuration directory .netbeans that is in the user home directory. Closing the issue.
Has worked a little more and found that this problem still exists.