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So, it's difficult to say without knowing more about the different installations that took place on your machine. I would say that Designer admin version was installed in the past and later uninstalled.
The script in charge of .adding the localization variables (language and translation database) to R first checks if it could find an admin version (Key HKLM\HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SRC\Alteryx exists) and, if not, looks for a non-admin version (Key HKEY_CURRENT_USER\Software\SRC\Alteryx exists).
From these keys, it's going to extract Alteryx Designer installation ("InstallDir64") and Designer installation language ("Language"). If, following a previous installation, registry was left "dirty", Predictive tools could be confused (from not being able to install to produce various errors like this one).