There is only one file type that uses the .LLX extension:
LabVIEW VI Library Backup File
Backup of a LabVIEW VI library (.LLB) file; used for scientific testing, measurement, and control applications; created automatically by the VI Library Manager when an LLB file is built.
NOTE: The ".llx" extension may need to be renamed to ".llb" to open successfully.
|National Instruments LabVIEW||Commercial|
Updated: July 9, 2007