Allow, Block Or Remove Apps Windows Firewall

[win]

After the code runs, select Block, run the code again, select Find, although it can be found, 

but there are no rules added in the system firewall, and I can't see the added items using the latest Firewall App Blocker (Fab) v1.6.

I don't use code, directly added any program using Firewall App Blocker (Fab) v1.6, which I can see in the firewall rules.

system: win7  x64