Extensions not showing up in dwcs4 after installing successfully

I have dwcs4 & extension mgr. I have installed extensions in extension mgr. successfully according to it but when I go back into dwcs4 they do not appear under the tcn widgets tool bar. dwcs4 does appear in my extension mgr. & is highlighted in blue when I click on an extension to install it. I have noticed that the extensions do not show their individual icons next to their names but the puzzle piece instead even after I install them & get the "installed successfully" confirmation. I also notice that if I try to install them again they are still in the "c:\users\myname\documents\downloads file which I would think they should be some place else. document download.  Can someone tell me how to manually place the extensions into dwcs4 so that they appear in the tcn widgets tool bar?