What about breaking down the menu into groups?
Yes, it is convenient to have everything on top level ... until it isn't.
Since I don't use GExperts, my grouping suggestion is only based on menu names, not on actual functionality - so some placements may be totally wrong.
File
Code Librarian
Code Proofreader ...
Favorites
Open
Project
Backup ...
Class Browser
Dependencies
Source Export
Component
Copy Names
Find Reference
Grid ...
Hide / Show Non.-Visual
Rename
Replace
Select
Set FocusControl
Set Tab Order ...
To Code
Editor
Bookmarks
Comment Empty Code Blocks
Clipboard History
Experts
Focus
Go to
Grep
Next Item
Previous Item
Results
Search ...
Macro
Library
Playback
Record Start/Stop
Tools
Ascii Chart
IDE Menu Shortcuts...
Keyboard Shortcuts
Message Dialog
PE Information
To Do List
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Configuration
About
Window
Add Dock Window
Reselect Desktop