With Filestar you get 0 different skills for working productively with Apple II High-Resolution Image (.hgr) files.
About .Hgr
Name
Apple II High-Resolution Image
Extension
.hgr
Format
Binary
Category
Raster Image
Developer
Apple Computer
Description
A 280 by 192 monochrome screen saved from the Apple II high-resolution graphics page: 8,192 bytes of bitmap with no header. RECOIL decodes the bitmap; the machine's NTSC artefact colour is not reconstructed.