I added module through drag and drop in additional module path .
I want to remove but i could t find a way to remove the added path . Only option is to restore to default
Why do you want to remove it? If your goal is to retest with new updates, just hit the Reload button (afetr you enable Developer mode).
If you want to remove, go to Module paths under the application settings, remove the path to your module and restart slicer ( as far as I know you cannot unload a module without restarting).
You need to restart your slicer session for the path to be visible.
Again why do you need to add and remove the module within the same session?