When installing Imaging Engine 14 Assembly 1 on a new server, a message will appear that you first have to install the FlexProofE prerequisites (in case you have a FlexProofE license).
When checking MySoftware, you will however not find a FlexProofE prerequisite 14 download.
Answer
There is no Suite14 FlexProofE prerequisites download available. You can use the FlexProofE Prerequisites 12.1.2 download instead.