little information is provided howto install various applets, extensions and desklets. I download them from http://cinnamon-spices.linuxmint.com/ and extract the contents of the archives in subfolders in ~/.local/share/cinnamon, where the names of the subfolders are applets, desklets and extensions. The contents of these are folders for each applet, extension, etc. The list below shows what I have installed and whether they work or not...
betterplaces@bownz -> Works
MessagingMenu@bownz -> Works
cpufreq@mtwebster QuitApplet@bownz -> Works
firstname.lastname@example.org -> Does not work
email@example.com -> Does not work
firstname.lastname@example.org -> Does not work
CoverflowAltTab@dmo60.de -> Works
Can anybody tell what I am doing wrong and provide me with a manual howto install them the right way??