D5 render download old version

My version 1.8Pro is working very slowly, I want to load older versions but can’t find the link, can anyone help me?

Hi there,

What do you mean by working very slowly? Could you elaborate on the issue, better with some videos of it?

Render GPU images not using 100%
When rendering I use another window for entertainment (Chrome) D5 hardly work.
I like the way 1.7 works better even though version 1.8 has many new features. The problem is I can’t find links to download older versions.