According to documentation on PCGamingWiki and community changelogs, this version introduced:
The file typically refers to a major official update patch for the real-time strategy (RTS) game Supreme Commander , developed by Gas Powered Games. This update, often categorized under the v1.1.3251 to v1.1.3280 build versions, significantly improved game stability and added new content. Key Features of the v1.1 Update This specific standalone patch is generally used for
Improved waypoint line rendering and resolved specific crash bugs, such as those occurring when air units refueled on staging platforms. these updates are typically pre-applied
This specific standalone patch is generally used for retail (disc-based) versions to bring them up to the final stable build. If you are using the Steam or GOG versions, these updates are typically pre-applied, and the PCGamingWiki Patch Repository notes that in-game version displays may sometimes be inaccurate. This specific standalone patch is generally used for