AxCrypt 1.4 is not old. It’s ancient, it’s over 15 years old! You *really* should consider keeping your system and software up to date.
I’m very confused when you say “the axcrypt application file that it put in the program files/axantum/axcrypt folder doesn’t run – nothing happens when you click on it“. Of course not, AxCrypt version 1 never worked like that.
You say you’ve used AxCrypt since 1.4 – it never worked like you try to – clicking the AxCrypt executable. (Version 2 *does* work like that).
Are you sure you’ve used AxCrypt version 1 before?
Please read the instructions on how AxCrypt 1 works at http://www.axantum.com/ .