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
Yes, you can do this easily by copying the corresponding directory (or jar) from the source eclipse install plugins/ or/and features/ directory to the target eclipse install plugin/ or/and features/ directory.
Depending on the Plugin you may encounter compatibility issues when source and target versions differ. Some Plugins work with a braod line of eclipse versions, some require a distinct version.
Also, a general hint: Don't be vague, be more specific. Sometimes there are known issues with setups, versions and the like. Being specific can potentially help identify a complex problem.