Cannot Open A Library File Using the 'Option' key When Launching iTunes
I found that when I tried to open a different iTunes library file then my default by using the 'option' key when lanching iTunes that the iTunes Library file was greyed out.
I looked in the previous Library Folder and noticed that the old file had the extension .itl.
My solution was to add the extension .itl to the end of the of the file name of my iTunes Library files and things then worked when launching with the 'option' key. As an example 'iTunes Terry Library' became 'iTunes Terry Library.itl'. I applied this to all my iTunes library filles and all is well. Of course make a duplicate of the file you are going to change so you have a backup file.
I am using iTunes 10.4 and Sno-Leopard 10.6.8.
MJ