There are two options available, both of which are free of charge:
The first option is to use the database ‘Dump’ option found in the system setup. This will produce a series of folders, one for each file/client containing all their documents in whatever format they were originally stored in, such as TIFF, JPEG, Word, Excel, PDF, Emails, etc.
The second option is a royalty free license to use the software in a single user read-only mode.