I'm examining a symbol in a *.brd file, and I find the following line:
"Properties attached to symbol definition
LIBRARY_PATH = M:/afx/Board_Projects/LIBRARY/ALLEGRO_LIB/symb
But my library_path should be different; how do I update this information?
Create a library location, set the tools to use it (Setup - User Preferences - Paths - Library - psmpath and padpath) then try a Place - Update Symbols, check Package Symbols and any others that you need.