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I've deleted an project (via right click in projects window), and then included one of folders of that project in another project. Now, if I do quick search for an class, which is in included folder, NB offers opening previously deleted project. Are deleted projects not really deleted? Are cache files and indexes of deleted projects still saved? Is it bug or feature?
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss