I like that for Microsoft - M$
In CACLS, switch tee (/t) is a permanent change; switch e (/e) is a session edit that reverts when you reboot, that's all.

Checking Phoenix Labs website just now, I notice that PeerGuardian2 is open source, so I guess that answers almost all the questions. The only one it leaves is to verify that the compiled source code and the download are the same file. How easy is that going to be to do?