Add a plugin, unistalled it, tried reinstall doesn't work?

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I installed Easy News. Couldn't get it to work on one site so uninstalled it.

I installed it on another site and managed to get it to work.

Went back to the site I'd uninstalled it from and it says it can't find the add new page?

Is there something in the config on concrete that's stopping the package from working second time round?