S_BlurMoCurves issue

Okay hi. So I've got two computers (both Macs) and I use a hard drive to carry my saved work, presets, transitions, etc from computer to computer. I installed S_BlurMoCurves (sapphire) on one computer and saved everything including the installers on the hard drive. This was a while back though so I can't remember exactly how I did it. I plugged it into the other computer and tried to download/install it there too, but it's not working. I install it, it says it's finished, and then I go into After Effects and I can't find it. Says it's "missing." Do I maybe need to do something with the installed plugin that I'm not? Is there a step missing? I for the life of me cannot remember how I did it last time and it's becoming more of a problem since my other computer is getting slower and crashing more often, so I need to start working more on this one that refuses to run the plugin. Can anyone help?