Let's go over the difference is between the two keys available to activate Foxit's PDF Editor:
Registration Code: Here the key takes form of a 30 Digit Code mostly used by consumers and small organizations whose users have admin privileges and install the software themselves.
License Key File or "fpmkey": Here the key is more complex, taking the form of a text file, and it is essential if you are looking to deploy Foxit PDF Editor to your end-users via server (SSCM/GPO/KACE/CMD... etc.) or looking to deploy the software in your server (VDI)
Q: Why can't I use a Registration Code to Deploy Foxit PDF Editor?
A: Technically, you can use a reg code to deploy the software, but end-users will need admin privileges to activate the software the first time they run it.
Q: Is there a fee for a License Key File?
A: Yes. Software standardization is different from organization to organization, and we want to give our customers the flexibility of choosing the right activation method for their company.
Q: Which one can I use in an offline environment?
A: Only fpmkey allow activation in an offline environment.
Q: Do I need multiple fpmkey files if I am deploying via/in different servers?
A: No, one license key file will be enough. Simply make a copy of the file and use it as many times as you'd like.