I have it on the primary machine I'm using. I have 3A installed on my laptop, but borrowed that to my kid for university, as I only bought it for travel, and none of my work things are on it. Since I've been using it from way back in the  dark ages, 1.7 is simply the point at which I got sick and tired of something breaking with every new update and where most of the scripts and shaders I have use for work.