There is no cost for Publishing Assistant for registered users.
There are some requirements to be met by those who would like to use Publishing Assistant. For details please read the Publishing Assistant Distribution Policy.
What is the difference between PA 5.1 and 6.0?
In terms of typesetting features, PA 5.1 and PA 6.0 are identical.
The major difference is that PA 5.1 works only with Paratext 7 projects, while PA 6 works only with Paratext 8 or newer projects. Also keep in mind that PA 6 requires separate registration.
Do I need separate registration code for PA 6.0?
No. If you are using Paratext 8 or newer, your Paratext registration also records Publishing Assistant status. To check your status, log in to Paratext Registry and then click on your name in the top right corner. Select the Registration menu item. You’ll see something like this:
The third line will tell you whether or not you are authorized to use Publishing Assistant.
If you think that your PA status is incorrect please contact support.