Installing CCleaner Professional Plus on all three computers

I have updated CCCleaner on my computer. The update covered up to 3 machines. How do I get the update to this machine? It wants to charge me again!

Both machines are in my name, same passwords etc.

Just download the free version from here

https://www.ccleaner.com/ccleaner/download

When installed just select ..Options..About.. and press the button at the top which says Upgrade to Pro

Then just enter the details it asks for.

Also this: https://support.piriform.com/hc/en-us/articles/360028350711-How-many-computers-can-I-install-CCleaner-Professional-Plus-on-