I'm asking the same thing, man, I managed to download the WS version just to encounter an error at the end that broke the installation and made me re-download it all over again, I'm pissed.
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¿Are the devs really that lazy? Having to download both WS and Steam versions just to link your account are a pain in the ass for users who doesn't have speedy nor stable connections, come on. And to top it off the WS it's HARD as hell to download with all the errors the launcher throws at you.