open 7zipmanager then browse to the archive and double click on it to open the archive then click on extract then click on the little button with the three elipses(...) in it to open a browse for folder window and brose to te location you want to extract the files to then click on ok on the browse window then ok on the extract window 7zip will noew extract all of the folders into the folder you browsed to
to change the default program for archives again in 7zip click on the word tools at the top of the window, then click on options, a window will open listing all the file types that zip can work with, click on the button neer the bottom labeled select all then click apply then click ok
harpo