The plugin is not discovered, so doesn't show up in the "open with" menu.
Maybe it would be good to turn the plugin into an OSGi bundle, so that it works without any problem for the next releases?
I have no problem running the plugin (0.7.5) on Eclipse 3.3 M4 on Windows XP. On which OS did you try? You see the plugin listed under the "plugins" directory? Do you have anything in Eclipse logs. OSGI is considered as well as an update site for a next major release.
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