The keys for the passwords are as follows: pdf-userPass and pdf-ownerPass
pdf-userPass is the passwords the user has to enter at the moment when the user opens the pdf.
pdf-ownerPass is the owner password which is used to encrypt the pdf. An owner password als always required, the user password is optional.
Profiles are stored in the Windows registry. So if you already have a user profile, then you can see every profile key and value here: HKEY_CURRENT_USER\SOFTWARE\PDF24\Profiles\fo\XXXX