Hello

It's topic from 2006 year. Another hosting, there was folder with old builds.
This folder doesn't exists anymore

Just now are available releases from 4.5.7 on the 
http://pspad.poradna.net/release/<name>

pspad501inst_cz.exe
pspad501_setup.exe
pspad501cz.zip
pspad501en.zip
pspad500_setup.exe
pspad500inst_cz.exe
pspad500cz.zip
pspad500en.zip
notepad.zip
pspad462cz.zip
pspad462en.zip
pspad462_setup.exe
pspad462inst_cz.exe
pspad461_setup.exe
pspad461cz.zip
pspad461en.zip
pspad461inst_cz.exe
pspad460cz.zip
pspad460en.zip
pspad460_setup.exe
pspad460inst_cz.exe
index.php
pspad459cz.zip
pspad459en.zip
pspad459inst_en.exe
pspad458cz.zip
pspad458en.zip
pspad458b2485.zip
pspad458b2482.zip
pspad458b2481.zip
pspad457en.zip
pspad457cz.zip

Developer builds are available in the pspad developer forum, but I am afraid
they will be available from 4.5.8.
I can look in my archives if I will be able to find any older releases if you
are interested

-- 
<https://forum.pspad.com/read.php?4,71218,71243>
PSPad freeware editor https://www.pspad.com

Odpovedet emailem