I have the latest version of the plugin (1.07) with NPP 4.7 and I am seeing a couple minor bugs:
In split view, the plugin will not run on the second view (for a horizontal split, it only runs on the top view). When you have the second view selected and you click 'Run', the plugin executes on the first view. This could be dangerous as you might accidentally run a script on a different file than you intent.
Second, when you dock the plugin and click close, the docking window does not close... it just goes blank. The next time you open the plugin, a second docking window is created and when you try and close one of these, NPP freezes.