I need to add multiple folders/subfolders of some programs containing exes to block, all at once. Could you add such a feature?
No.
FirewallHardening is a security layer intended to block mainly LOLBins. It is not a privacy tool.
If you want to block applications, you must block each EXE file separately.
I've got some questions:
1. I wonder why rules added from gpedit.msc say v2.30. Rules added by FirewallHardening tool shows v2.30.
I chose the method that works well on Windows 7, 8, 8.1, 10, and 11. There is no need to change it.
2. Also, I wonder why rules added by this tool doesn't appear listed in the group policy editor.
They are not added via GPO, which is absent on Windows Home.
3. Are these rules, created by your tool, overridden if I install a third-party security suite with its own firewall?
Yes, if this firewall disables Windows Firewall.