I generally download the separate components from the licensing portal: Designer and then Predictive tools installer. Run Designer Installer first, then run the predictive tools installer. Then you can run the installs for any of the kits like Tableau Starter Kit
Your suggestion worked. The challenge with me installing the newest version was my IT team was trying to do it remotely using a different account and trying to pass this on to me. Ultimately IT had to do the install on my PC using their admin rights and it worked fine.
I've installed the 2018.4 Alteryx already but when I try to run R Installer as I did it with previous version of Alteryx, it crashes with error "Generic Tool (1): Can't find plugin "AlteryxRPlugin.dll" ".
I tried to manually put directory for Alteryx and its bin directory but this didn't work either.