CCleaner Pro PLUS registering issue

I just bought CCleaner Pro PLUS. It installed each of the software components. Then when I tried to activate each of them I had a failure. I need help.

To clarify, I was able to activate CCleaner, but the "registration dialogue boxes" for the 3 other programs remain frozen until I can force close the boxes. Then after I force close the registration boxes, the programs will open, but remain unregistered.

The way that this PLUS software installs is awkward. When a module is finished installing then a registration box comes up, and is then interrupted by the next module installation and so on until all are installed.

I was expecting a way to contact Piriform directly but can't find a way to do that.

I had a similar issue with the PLUS installation.

for me, my work-around was to get each of the Free builds individually, install each and plug in my license detail for each.