REX 4 Texture Direct will not download

Hi i just baught Rex 4 texture direct, unfortunatly i cant seem to install it. i have looked at guides on how to install it and still no luck. most guides and videos show the folder that is downloaded when rex is purchased is full with numerous files, However the one I downloaded (From the REX store its self) only has "rexfileinstaller_20160815" and "rexinstaller"

I'm not sure what is the problem and im hoping that i am not missing any important files. But if I am I am not sure what to do next,

Thanks.

Update: after a lot of searching i found that changing the drive I install the files to seems to have made it work. Interesting (or im just a touch tired and didnt realise i didnt use the installer correctly)