I am busy writing a plugin (called supermail), so I install, activate, deactivate, and delete the plugin fairly often. However, quite often one or more of these operations doesn't go smoothly, and I just manually delete the files. When I install the plugin again by uploading a zip file, called supermail.zip, I find the plugin installed under a directory called plugins/supermail1. I assume this is because WP still has a record of the plugin, somewhere in the DB, or even maybe just in session. Short of restarting Apache, is there anything I can do, both in my plugin code to help ensure this doesn't happen, and as administrator, to result the issue when it does happen?