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The installer on his website is the latest one. It is the updated one, it is just called the same thing. There has been 2 updates to the windows installer, RC1 > RC2 > RC2a. All the while the windows installer name stayed the same (purplera1n.exe). So just downloading it from his site will give you the most up to date version.
 
YES!! I'm not the only one that asked this! but yeah, as i found out (not to kindly i might add) that's it's just the same name for a different thing
 
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