I can't open my A58's raw files (.awr) on photoshop CS6 (Camera Raw plugin 7.1) is there any chance to update my camera plugin manually or convert the file?
According to Adobe's Camera Raw Supported Cameras page, the A58 requires Camera Raw version 7.4
According to their Compatible Adobe applications page, CS5 only supports ACR plugin version 6 (6.0-6.7). Are you using CS6? If so, should be able to update camera raw as high as version 8.71, according to that page.
Maybe try to convert them with the adobe dng converter.