Retrieve Photo Captions

My Gallery is so completely down that I can't get to the information that is requested for posting here. All I am trying to get out of my old Gallery installation is the photo captions. I installed a new latest stable release of Gallery, and re-uploaded all photos. But what I don't know how to get is the photo captions from my Gallery 2.1 install.

If someone can point me to where the captions are stored, I think I can take it from there. I found the XML file that lists all the old JPG names, but can't find where the app stores the album names, album descriptions, photo descriptions, that sort of thing.

Gallery version 2.1:
PHP version (5.3.13):
PHPInfo Link (/usr/local/bin/php):
Webserver (Debian?):
Database (MySql 5.5.32):
Activated toolkits (?):
Operating system (Mac OS X Mavericks):
Browser (Safari 7.0.3):

Claidheamdanns

I will give that a try, if I can follow it. Seems pretty complicated to me, but I will try to follow it, step by step.

Thanks for the help.