In System > Overview you have a field that says: "BMminer Version" and it will either be 1.0.0 or 2.0.0. It's that same screen where you see that "failed to connect" error message early in the boot process.
I am running the Nov 29th firmware (which is the last one they released) on my newer S9 and it doesn't cycle the fan speeds up and down, it stays pretty steady (without letting it hit 100 degrees which is also good). But unfortunately there is no manual control.
I am contemplating putting the V1 S9's on antpool rather than upgrade them. I have never mined there before but maybe it would be the most karmically just solution.
I have mine slightly OC'd with static fans and if I went with the firmware upgrade I would lose the ability to do either of those things.
Thanks for the directions. It seems im running v1. But apart from one board which shows 1000hw errors, the other two show 200, 300errors respectively, its not bad. Obviously haven't found a block and most likely never will with it running at 4.3Th but the HW Error rate is currently at 0.0008%. Bestshare reported as 2,479,422,642 which I don't think is bad considering its only been running for just over 2 days since the last time it was cleaned out.