Gshare SDS (Satellite Distribution System) updates are typically device-specific.
Since .rar is a compressed format, you will need extraction software: Download Gshare SDS rar
Is there a safe way to open an rar file using a windows program? Download Gshare SDS rar
Check your decoder’s settings under About STB or a similar menu to find the exact model and serial number. Download Gshare SDS rar