Using Win7: I have many different configurations and use .bat files to choose which one to use when I start calibre. Examples:
Code:
set CALIBRE_CONFIG_DIRECTORY=D:\CBH_Data\calibre.git\config_test_small
calibre-debug -g
and
Code:
set CALIBRE_CONFIG_DIRECTORY=D:\CBH_Data\calibre.git\config_test_temp
calibre-debug -g
I doubt that UNC paths will work.