@zubaz

i did but still no replies. support is so slow

sooooooooooooooo slow!

Registrations and download links can be accessed by logging in with a Stardock account at https://store.stardock.com/myaccount/products or installing through Stardock Central (currently in beta but available at https://www.stardock.com/products/stardockcentral/ ).

I show no registration attempts for you.  

If you have not installed, do so.

Then follow the followign steps:

Right-click on the desktop and select "Configure Fences".
Select the "Unlock" button it and follow the steps to unlock it, typically email and password are all you need.
Otherwise, select the "I have serial" button

If you are prompted for the off-line activation follow the steps illustrated below:

Select http://sd.stardock.com/zubaz/images/2013-01-29_1219.png

Then select http://sd.stardock.com/zubaz/images/2013-01-29_1219_001.png

Fill out the form at http://sd.stardock.com/zubaz/images/2013-01-29_1221.png

Select Register

Select OK: http://sd.stardock.com/zubaz/images/2013-01-29_1222.png

Select OK again: http://sd.stardock.com/zubaz/images/2013-01-29_1222_001.png

Fill out the form and select Activate: http://sd.stardock.com/zubaz/images/2013-01-29_1222_002.png

A message will open with instructions: http://sd.stardock.com/zubaz/images/2013-01-29_1225.png along with a window displaying the file to upload to http://activate.stardock.com/ : http://sd.stardock.com/zubaz/images/2013-01-29_1226.png

Please follow the instructions on that page:
http://sd.stardock.com/zubaz/images/Start8_unlock7.png
or
http://sd.stardock.com/zubaz/images/Start8_unlock8.png

Contact support if the above does not help.

Unless you're referring to the trial, there's no free version of WindowFX.  If it's an old version, then it's not supported on Windows 8.