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Click Plugins then point to Plugin Manager and select Show Plugin Manager. If there is still something wrong with your plug-in, try reinstalling it. In my Notepad++ I installed the Spell Checker plug-in and it appears underneath the Plugin Manager. By default, Notepad++ has the following plug-ins installed: The plug-in should appear anywhere on the list. Now, check if the plug-in you installed previously that triggered the error is up and running. The latest Notepad++ already comes with the latest version of Plugin Manager, version 1.3.5. Once downloaded, run the installer to upgrade your existing version to the latest. Go to Notepad++ Home to download the latest version. In your case, it would be better to update Notepad++ to the latest. The plug-ins used in Notepad++ are being updated from time to time and if you are not updating Notepad++, the plug-in you install may no longer be compatible with your current version. If the plug-in you are trying to install triggered that error, you probably haven’t updated Notepad++ yet. If you are using Notepad++, installing a plug-in is made easy through its Plugin Manager plug-in which is installed by default. This plugin is not compatible with current version of Notepad++
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