How to emergency stop a running script? - please advise
you can kill the BetterTouchToolAppleScriptRunner or BetterTouchToolShellScriptRunner processes - however for Apple Script even that might not always stop the system from continuing after the script has been "submitted" if there is no stopping condition in the script. Usually it will work though.
If it is a javascript you need to kill the whole BetterTouchTool process
Hello. It worked out: I embedded a flag check in the script itself in some places, set the flag on the "kill" button, and the next check stops it.