With Filestar you get 0 different skills for working productively with Shapefile Index File .(shx) files.
About .Shx
Name
Shapefile Index File
Extension
.shx
Category
GIS
Developer
ESRI
Description
Index of ESRI Shapefiles (.SHP files) that stores index and offset information from the main Shapefile; allows for direct access to records in the main file; consists of a 100-byte header followed by 8-byte, fixed-length records that define the SHP files referenced by the index file; often saved along with a corresponding dBASE (.DBF) database file.