I'm using Eclipse 3.6 for developing Eclipse plug-in. In the same workspace, I have 2 Plug-in projects: projA and projB. No mater which project was run, both two projects will be loaded in the new Eclipse instance. If I only want to load projA, I have to close projB, why? I run the project like this: right click the project and "Run as--- Eclipse Application".
Have you defined the target platfom?
You can also edit your Run Configuration and choose the plugins to launch with.