BTT couldn't start in macOS 10.14.1

Describe the bug
When I click the icon of BTT, it shows up and closes automatically.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
15 inch RMBP mid 2012

If applicable, add screenshots to help explain your problem. (You can just paste or drag them here)

Device information:

  • Type of Mac: MacBook Pro (Retina, Mid 2012)
  • macOS version: 10.14.1 (18B75)
  • BetterTouchTool version: The latest version

Additional information (e.g. StackTraces, related issues, screenshots, workarounds, etc.):
I used to use old version of BTT for a long time. When I met this issue, I simply delete the old one by dragging it to trash bin, and bought a new license for using the newest version of BTT. But since I downloaded the newest version's App and put it into the application folder, it still don't work. I've even tried to delete it by CleanMyMac, and reinstalled it, the issue is still here. I don't even have a chance to finish registration!
I think it's the old version's problem that cause this issue, because I can use BTT on a brand new iMac which hasn't used BTT.
Is there any suggestion for me to handle this issue, I really love BTT!

Have a look here:

Thank you! Thank you!
Sorry for asking you such a basic question, I ought to do more search instead of post this question.
Anyway, thanks for developing this awesome software!