Previously had v3.x installed (not sure, maybe v3.1).  Installed v4.0.2 without uninstalling v3.x.  Now, whenever prog is opened, an error message appears.  Window title is "C:\Program Files\Notepad++\plugins\NppInsertPlugin.dll".

Message is:
Missing "messageProc" function

This plugin is not compatible with current version of Notepad++.
Remove this plugin from the plugins directory if you don't want to see this message on the next launch time.

I can click the OK button which allows prog to open, and it functions appropriately.  However, if I remove NppInsertPlugin.dll from the Notepad++\plugins directory, the prog opens without the error message.  Is this file necessary, or has it been done away with since the version I was using?

System: AthlonXP 2700+, 1GB PC700 RAM, Win2k Pro sp4