The other day a message popped up in my screen indicating there is an upgrade for software on Analog Lab V. Naturally I clicked it to avail the said upgradement. After completing the download/upgrade, I opened Analog Lab V. Strangely a very sharp annoying noise emerged. I regretted in updating the software. Question is, how can I get rid of this noise? Or how can I get back to the previous level when it was not updated yet?