How can reattach keyword tags to photos after switching to PSE11

Question

I recently upgraded from vista to windows 8.
I then upgraded from Photoshop elements 9 (I think) to Photoshop elements 11.  I had catalogs and pictures scattered in different places so one of the options was just too gather all of the photographs on the hard drive and start a new catalog.  It worked, and so all of my pictures are under one catalog name which is perfect.  The key word tag categories are listed as I had sent them up in the previous version, but none of the photos are actually labeled with their keyword tax.  How can I reattach the tags to the pictures.
I appreciate any help I can get with this thank you.

Answer 1

Here is the link:
http://johnrellis.best.vwh.net/psedbtool/
and mor precisely
http://www.johnrellis.com/psedbtool/#_Writing_File_Metadata
Unfortunately, as you can see, that tool has not been updated to PSE9. Its advantage for writing the tags is that the organizer (all versions) does only add tags to the files without replacing the old tags while psedbtool replaces the tags.
If you have not yet used the 'write metadata to files' feature in PSE9, you don't need psedbtool.
Another note for PSE11 users:
That behaviour of the organizer has not been changed, but you can use another tool to erase tags for a batch of selected files.
In the information panel on the right, expand the 'metadata' section, and click on the rightmost icon to get detailed view. Expand the IPTC section. Click on the 3 dots icon to open the IPTC dialog. There you can choose to delete all keywords.
Or:
After selecting your pictures, click on the 'Add IPTC data' button in the information panel.