GET SCAF for Windows:
1) Load the plugin: SCAF Windows.zip  and test it in demo mode.
Documentation included.
2) Click the Register button. The Registration Dialog appears and shows your LOCK number.
3) Now you can pay at shareit.com and enter the LOCK.
4) The ID and KEY values will be sent to you within 2 days.
5) Enter the ID and KEY in the Registration Dialog. 
After a restart the full version appears.