BlockBlock can not block anything

[sgon00]

OS: MacOS Big Sur Version 11.2.3 (20D91) BlockBlock version: the latest version so far, v2.0.3 (all previous versions have the same behavior)

It just dosen't block anything. It has popup windows when other apps try to modify system, For example, adding login iterm to backgrounditems_tmp.btm. But the login iterm can be added into the file anyway before I press "Block" or "Allow" at the BlockBlock popup window. Even if I choose "Block", it won't do anything. The login iterm is still there. I can see/check the added login iterm by using bgiparser.py tool.

I don't know if I misunderstand anything about the purpose of BlockBlock or not.

Thanks a lot.