: Modding communities and patch tools (such as CNCNet for classic RTS games) frequently distribute custom configuration archives with "config" and "beta" in the name.

: Radio configurations like those for the RTL1090 software use specific "Beta Config" menus to route data for platforms like Flightradar24.

The query for beta_config.rar is ambiguous because it refers to a generic file name used across several different software applications and systems. Here are the most likely topics it could relate to:

: Software systems using the BETA CAE suite for simulation and engineering often utilize configuration and license files with similar prefixes.

Please clarify which specific software or system you are working with before I can provide a report or analysis.