Files with flex file extension are related to the Flexi Data Smoothing data format.
FLEX file extension - Flexi Data Smoothing data
What is flex file? How to open flex files?
File type specification:
The flex file extension is associated with the Flexi Data Smoothing, a software for Microsoft Windows operating system.
The flex file stores some kind of data used by Flexi Data Smoothing program.
Flex is also a software development kit (SDK) from Adobe.
This flex file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.