"And the FortisBlue upgrade path is here: https://www.docuware.com/support_faq/index.php?solution_id=3920"
Note that the upgrade path for FB stops at 6.8 in that FAQ. There are versions above 6.8 right?
So would the path be
A. Perform an in-place upgrade of FortisBlue v2.3 to 2.4, 2.4 to 6.8, 6.8 to 6.9, 6.9 to 6.10, and 6.10 to 6.11/6.12.
or
B. Perform an in-place upgrade of FortisBlue v2.3 to 2.4, 2.4 to 6.11 (or 6.12).
Can't you skip from 2.4 directly to the latest version of FB available?