You will want to either remove or update your custom eq2ui_mainhud_skills.xml to get your skills window to look like the new updated one released in live update 11.
A compare from the old files to the new ones can be found here:
http://www.eq2interface.com/forums/s...ead.php?t=3467
Guides on the UI Builder can be found in the XML Modification Help & Info forum and information on how to modifiy the graphics can be found in the DDS/Graphics Modification Help & Info forum. Start out makeing very small changes and try to learn something new each day, if your new to programing your progression will be slow to start.