If it isn't broken, don't fix it. Many users have workflows that rely on the specific interface and codec behaviors of older builds. New UI overhauls can confuse muscle memory, and occasionally, newer builds introduce bugs or codec conflicts that weren't present in previous iterations. For users encoding large batches of files, stability is king.
What makes this specific build a powerhouse? Let’s list the technical specs that version 51400 offers that many newer versions have removed or broken: format factory 51400 older versions for windows exclusive
The demand for older software versions, such as Format Factory 5.14.00, stems from various needs: If it isn't broken, don't fix it