Hello Everyone,
I've had an issue for a while where a sound appears every time I do something in Keyboard Maestro.
Its a "dut" sound like when you press a key while your not in a typing field. It happens when adding Actions or making changes. Every time when Keyboard Maestro saves the current stage.
Does anyone know what this is? Its really annoying 
Cheers,
Frozen
Check the Editor.log file.
Is it successfully saving changes? Make a change, quit and relaunch and verify if the change is sticking.
Check your Preferences folder (Help ➤ Open Preferences Folder) and verify the ownership and permissions of the folder and its contents.
That helped me! Apparently my syncing didn't work:
2017-07-15 13:41:38 ERROR: Preference shared sync write failed
This probably happened due to my reinstallation/downgrading. Thank you very much!
I didn't know about the Editor log file 
Hey all. So I believe I have the same error as @FroZen_X.
I have tried restarting KM engine and KM itself but that did not help. I don’t know where Editor.log file is located and I checked permissions of KM folder and they seem valid.
You can open the log files folder from KM Editor's Help menu:
Thank you. Resetting syncing seems to have fixed it. 
This saved my bacon - thank you!
For me, permissions were good but the Editor.log file showed hundreds of "Preference shared sync write failed" (one for every annoying beep)... 
I didn't find how to reset syncing but I transferred the com.stairways.keyboardmaestro.editor.plist to a temp folder, restarted my MBP and the problem was solved.
Thanks for the help!
Seems like I am not alone to have struggled to find the cause of these sounds... so if @peternlewis could do something to make this error simpler to understand it would be great.
Display a "Could not write sync file error" ?
Thanks.