How do you \"remove\" or \"copy\" an eclipse plugin from one eclipse install to another? E.g. I have two installs of eclipse, one of which has a plugin installed that I don
>>How Do You Reinstall Installed Eclipse Plugins?
You don't.
There is no Reinstall Plugin option in Eclipse.
You can, however, uninstall the plugin (***) and reinstall it using MENU >> Help | Install new Software
(***) Follow Sebastian's uninstall instructions, which still work in the latest Mars version of Eclipse.