Plug-ins work very similar to extensions on your system. They replace resource ID's in the EV files to make their changes. Plug-ins can also leave the main information alone and simply add on to what is already there (using unused resource ID's). In either case, EV will have to be launched with the plug-in in the Plug-ins folder for the changes or additions to take effect. Also, since there is a possibility of multiple plug-ins using the same resource ID, it is recommended that you use only one plug-in at a time to avoid conflicts. If you do wish to use more than one plug-in at a time, it is recommended to downloaded a copy of the EV Plug-in Auditor to check for conflicts.