Free Edition:
http://download.ccleaner.com/ccsetup545.exe
Portable:
http://www.ccleaner.com/ccleaner/download/portable/downloadfile
Professional Edition (Old Setup UI):
http://download.ccleaner.com/pro/ccsetup545_pro.exe
Professional Edition (New Setup UI):
http://download.ccleaner.com/ccsetup545pro.exe
Technician Edition:
http://download.ccleaner.com/te/ccsetup545_te.exe
Business Edition:
http://download.ccleaner.com/be/ccsetup545_be.exe
Business Edition MSI x64:
http://download.ccleaner.com/be/ccsetup545_x64_be.msi
Business Edition MSI x86:
http://download.ccleaner.com/be/ccsetup545_x86_be.msi