Smart SDR fro Windows unexpectedly quit while on 20 DAX, when I re-launch Smart SDR I have visible signals on the panadapter but no control sometimes audio as well, (it is not off screen to the left or right, just not there. Add a slice and it comes up fine as slice B. Quit Smart SDR and the re-launch, same result. Quit smart SDR, CAT, shut the radio off, then restart the radio, CAT, finally Smart SDR, same result. Switch to another band and the receiver control reappears, switch back to 20 and it disappears again, double clicking on a frequency does nothing on 20. Going to shut everything down and restart computer, I am sure that will correct it. Flex 6500, SDR 1.024, win 7, Intel Duo 2.33, 64 bit, 16 gig ram.