The folder is hidden. Click on "View > Show hidden items" or just type "C:\Users\Public\Desktop" into Explorer's address bar and press Enter.

There is no public/desktop folder on drive c:
Newly installed icons are on all virtual desktops but not in the user/desktop folders....
I have no idea where windows8 put them..

Check the "FAQ" section at the bottom of this page: How to place different icons on each desktop.

I have reinstalled Windows 8.
Dexpot is working oke now except when I install new software Dexpot does not notice the new icon.
When I make a manual copy to desktop Dexpot notices the icon.
Is there a setting somewhere that arranges this?

Edit:
I notice that icons from new installed software show up on every Dexpot virtual desktop.
They do not show in Dexpot Window so I can not move them to different desktops etc.