I don't know if this is a problem or not, but thought I would post it. I've upgraded to 7.4.1 and wanted to revalidate the PIDs. I noticed at the bottom of the Scan screen that the VIN was correct but the OS was 19980200. I went to File -> Enter VIN and inserted the correct OS 19980400, but as soon as I connected to the car the OS went back to 19980200. It might have done the same thing with 7.3 and I just never noticed.