: If you have lost your Professional key, you can use the CCleaner License Lookup tool to retrieve it using the email address used for purchase. Best Practices for Use Problems activating or registering Defraggler Professional?
: Defraggler is no longer included in the CCleaner Professional Plus bundle because it no longer requires a license. defraggler professional key
You can buy a license directly from the official CCleaner/Piriform website . This guarantees a lifetime of use for the version purchased and official support. : If you have lost your Professional key,
These authorized resellers sometimes sell lifetime keys for Piriform products at deep discounts. A "lifetime" key for Defraggler Pro can occasionally be found for $14.99, which is cheaper than a pizza dinner. defraggler professional key