About older versions of the program

[aldist]

I think blocking with a firewall doesn't help because it is time limited. Let's say that for some reason I prefer an older version of the program that still works well, but I can't use it.

You are right, a firewall won't help because the time bomb is encoded in the binary.
This is a normal precaution of the developer to prevent you from using the free version when the paid version is released.
ISO is not covered by the time bomb.