» Upgrading From Vagrant 1.0.x

The upgrade process from 1.0.x to 1.x is straightforward. Vagrant is quitebackwards compatiblewith Vagrant 1.0.x, so you can simply reinstall Vagrantover your previous installation by downloading the latest package andinstalling it using standard procedures for your operating system.

As the backwards compatibilitypage says, Vagrant 1.0.x plugins will not work with Vagrant 1.1+. Manyof these plugins have been updated to work with newer versions of Vagrant,so you can look to see if they've been updated. If not however, you will haveto remove them before upgrading.

It is recommended you remove all plugins before upgrading, and then slowlyadd back the plugins. This usually makes for a smoother upgrade process.

If your version of Vagrant was installed via Rubygems, youmust uninstall the old version prior to installing the package for thenew version of Vagrant. The Rubygems installation is no longer supported.