Why did you change your Warcraft folder name? (I'm just curious) Try running Warcraft 3 and see if it helps. The paths to your Warcraft folder are stored in the registry and those are typically used by NewGen to locate files/run scripts. If you change the name of the folder, it might fail to load the mpq. Try changing it back to what it was before (temporarily).
Otherwise, first try restarting your computer and see if it fixes the problem. If that doesn't work, then try running the regular editor or Warcraft 3. Do those give the same Storm.dll error, or is it just JNGP that does that?
I'm going to move this to Warcraft Editing Tools.