Hi Indresh,
I have all that set up, now if you go to the3dstore.co.uk
and go to the Shop tab, go to 3D Printer Software and try purchase the prusaSlicer or Octoprint, you will see that you can purchase it as a guest, but after if you go to My 3D Files (Downloads) then you won't have a link to be able to click, despite hot linking being set up as you describe.
Cheers
Sam