If your PFTrack or PFClean entitlement expires, a window will be displayed showing you relevant information along with a link back to the PFAccount Admin Hub at https://pfaccount-thepixelfarm.co.uk where you can renew your product entitlement online:
HostID does not match this machine
If you encounter an error saying that the PFHostID on your machine has changed this may have been caused by recent changes to your computer hardware, specifically the network interface controllers installed in your computer.
To resolve this issue, please revert any recent hardware changes or visit the PFAccount Admin Hub where you can generate another static entitlement token for your new PFHostID. Further information about the PFHostID is available here.