Lightroom :: How To Delete Watermark Presets When File Is Missing

deleting watermarks from Lightroom 4.  I had a bunch of watermarks that I had created in LR4 that was a result of trying to redo a previously created watermark (why Adobe don't allow you to overwrite I don't know) but instead of overwriting the currently selected watermark LR4 lets you create a new preset from the changes.  These changes build up over time and you sometimes end up with missing or moved files.  If these graphic files are missing then you may or may not have ran into my dilema where when you select the watermark to try and delete it, the dialog box just keeps disappearing and nothing you do seem to work.  Don't dispear, here is a solution I've discovered that I couldn't find anywhere else.
 
1. Open LR4 (Not sure if this works with other versions)

2. Select the Print module (this seem to be the fastest, easiest way to access and edit watermarks)

3. Select the check box next to the watermark under the "Page" pane on the right (this will allow you to select and edit the individual watermarks)

4. select the dropdown menu and chose the watermark that you want to edit.  The dialog bot will open but beware it will quickly vanish in a couple seconds so here is my solution (at least until Adobe fixes this problem).  Grab hold of the dialog box before it closes and hold it for a few seconds, this will delay or stop it from closing instantaneously.

5. Select the dropdown menu within the dialog box and chose delete watermark option, confirm that you want to delete and voila!