- run the tool
- find the plugin jar and patch it
It works nicely, there is one gotcha however, which is not mentioned in the official instructions. You must choose the correct jar, the one, which is being used by WTP. It is possible to have multiple version of the same plugin jar - it is even anticipated if you update your plugins. So choose the correct version - it should be the most recent, with the highest version number. If you are unsure, try all of them, but don't forget to do a backup of the original plugin jar.
It can spare you few key strokes and eventually few trips to visualjquery.