The following forum message was posted by wonkkrish at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/3724033:
After installing PyDev, I find that almost none of its functionality is working, but Eclipse says that it is installed properly (and therefore won\'t let me reinstall). I cannot uninstall it as the PyDev manual advises, because the \'Uninstall\' button is grayed out. When in PyDev viewing mode, I cannot create a PyDev project.
Oddly, even after uninstalling Eclipse (including config files) and reinstalling it, the PyDev plugin remains, though functionless, and I can\'t uninstall it (or reinstall it). How can I get PyDev working, either by reinstalling it or by reconfiguring it?
The following forum message was posted by fabioz at http://sourceforge.net/projects/pydev/forums/forum/293649/topic/3724033:
The problem usually lies in the configuration files, so, reinstalling eclipse with those doesn\'t make much difference... Have you followed the instructions at: http://pydev.org/manual_101_install.html for the uninstall (it\'s on the bottom of that page). Note that there are differences from uninstalling depending on the way you installed (.zip or update site).
It seems a good number of people are getting corrupted installs... are you using the .zip file? I\'ll see if I can sign the next releases (in the hope that eclipse will be able to properly determine the file is corrupt).