Notes about the GAR file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The GAR file type is primarily associated with 'GPS_COM' by AviaDBM. GPS_COM is a program which performs Downloading, Uploading, and Listing of User, Route, Almanac, Track, and Proximity Databases, and Uploading of Aviation Databases using the serial interface.