Hi and welcome to Arturia forums.
I doubt your troubles has to do with a faulty controller or faulty Analog Lab.
Analog Lab don't - and your controller don't send out a high metronome sound. unless perhaps if it's triggered by your DAW. And then it's most likely about a wrong setup or wrong settings.
Have you checked, that your controller is set up correct in your DAW both as a keyboard and a control surface?
About the metronome sound: Did you check, that you actually did'nt have a metronome running in you DAW? Or having a Midi feedback of some kind?
About Analog Lab:
Did you select the controller in the standalone Analog Labs Audio and Midi settings?
If you mean your DAW don't show Analog Lab, then perhaps you have done a reinstall error.
Have you checked, that you have'nt got double installs, and that you have intalled the plugins correct? You don't tell, how you reinstalled.
I don't know about FL Studio, so i can't help with that.